eet ean eee a ey ee of ve jas New York State College of Agriculture At Cornell University Ithaca, N. Y. Library eo Be a THE Vear-Hook of Agriculture; OR, THE * ANNUAL OF AGRICULTURAL PROGRESS AND DISCOVERY, eal “os ‘tl b hit ' For 1855 and 1856.!!!((( 4; EXHIBITING THE a MOST IMPORTANT DISCOVERIES AND IMPROVEMENTS IN AGRICULTURAL MECHANICS, AGRICULTURAL CHEMISTRY, AGRICULTURAL AND HORTICULTURAL BOTANY, AGRICULTURAL AND ECONOMIC GEOLOGY, AGRICULTURAL. ZOOLOGY, METEOROLOGY, &c. TOGETHER WITH STATISTICS OF AMERICAN GROWTH AND PRODUCTION—A LIST OF RECENT AGRICULTURAL PUBLICATIONS — CLASSIFIED TABLES OF AMERICAN AGRICULTURAL PATENTS FOR 1854-55—A CATALOGUE OF FRUITS ADAPTED TO THE DIFFERENT SECTIONS OF THE UNITED STATES, &e. WITH A COMPREHENSIVE’REVIEW, BY THE EDITOR, OF THE PROGRESS OF AMERICAN AND FOREIGN AGRICULTURE: FOR THE YEAR 1859. ILLUSTRATED WITH NUMEROUS ENGRAVINGS. BY DAVID A. WELLS, A.M. MEMBER OF THE BOSTON SOCIETY OF NATURAL HISTORY, FORMERLY CHEMIST TO THE OHIO BYATE BOARD OF AGRICULTURE; MEMBER OF THE PENNSYLVANIA HISTORICAL SOCIETY, PENNSYLVANIA BIATE AGRICULTURAL SOCIETY, EDITOR OF THE ANNUAL OF SCIENTIFIC DISCOVERY, FAMILIAR SCIENCE, KNOWLEDGE 18 POWER, ETC. ETC. PHILADELPHIA: CHILDS & PETERSON, 124 ARCH ST. 1 a Entered according to Act of Congress, in the year 1855, by CHILDS & PETERSON, in the Clerk’s Office of the District Court of the United States for the Eastern District of Pennsylvania. STEREOTYPED BY L. JOHNEON & CO. PHILADELPHIA. PRINTED BY DEACON & PETERSON. PREFACE. THE object contemplated in the publication of the YzaR-Book oF AGRICULTURE is to aid the progress and development of that science upon which the prosperity of our country so eminently depends. In its preparation, the editor has carefully ex- amined every important agricultural or scientific publication which has appeared in the United States during the years 1854-55, together with very many of the jour- nals and publications of Great Britain, France, and Germany. He has not, how- ever, confined himself to the mere examination of agricultural journals and reports, but has taken advantage of every opportunity and resource which could furnish any thing of interest or value. The subjects embraced within the limits of a work, the object of which is to record the progress of agriculture in all its departments for a single year, are neces- sarily varied and extensive; since no branch of science or applied industry is de- pendent to a greater degree for its advancement upon assistance imparted from beyond its legitimate boundaries, than agriculture. Hence the operations of the mechanic, the chemist, the naturalist, the engineer, and statician, are all allied more or less intimately with those of the farmer. It is not claimed that we have collected all that is new, or that all we have published is the result of the operations of a single year, but we do claim to have noticed all the recent improvements pertaining to agriculture which have seemed to us of sufficient importance, or of which we have been able, after diligent effort, to obtain reliable and intelligible accounts. Every invention pertaining to agriculture patented in the United States during the year ending July, 1855, has been enumerated. All have not, however, been described, for the reason that no distinct descriptions of them have been published, and repeated applications addressed to the inventors themselves have failed of responses. Some of the topics treated of may also seem old and familiar, buta careful examination in such cases will show that they have found place in the record in virtue of presenting old facts in a new light or application, or because they contain, in addition to what was before familiar, new facts and suggestions. Novelty in arrangement and condensation may often render an old subject as inte- resting as a statement of novelties in fact. It has also been the aim of the editor to transfer to the pages of the Year-Book such reliable and standard articles on different agricultural topics as have appeared, from time to time, during the past year, in the leading journals of Europe or the United States. By pursuing this course, the Year-Book will be rendered eminently valuable, not only for the present but for the future, and a complete series of the volumes for successive years will thus form a most perfect and unique encyclopedia of every department of agri- cultural science. The Year-Book of Agriculture will hereafter be issued early in September of each year, and no labor or expense on the part of both the editor and publishers 3 4 PREFACE. will be spared to make it what it is designed to be—a complete and substantial summary of agricultural progress. To the many friends who have aided us in the preparation of the present volume we would return our sincere thanks; our acknowledgments, however, are especially due, for favors rendered, to:the Editors of the Scientific American and Philadelphia Horticulturist ; to'Mr. Nicol , Superintendent of the Model Farm of the Union Agricultural Soeiaty of Virginia and North Carolina; to Prof. B. L. C. Wailes, Geologist of Mississippi; G. E. Waring, Esq., of New York; and O. L. Flint, Esq., Secretary. of the, Massachusetts. State. Board. of Apribniline: In the publication of the Year-Book, of Agriculture one important fact is clearly and unmistakeably demonstrated—namely, that there is a constant progress and im- provement in every department of theoretical and applied agriculture; that many strong hands ‘and practical and comprehensive. minds are enlisted in the work of experiment, and investigation, giving us the. right. to eepeee from the future many great and valuable results. - PuirapeuPHta, October, 1855.. Communications for the Editor should be addressed “ Year-Book of Agricul- ture ;” Care of Childs & eta or David A. Wells & Co., 124 Arch Street, Philadelphia. * We would also take this sppottanitty to say, that while under no circumstances will the pages of the Year-Book of. Agriculture be open to the publication of articles having any thing of the character of advertisements, the editor will be always ready to give place to a description of every new and useful improvement pertain- ing to agriculture, and also for engravings, if necessary. t Peete. Hie I, Tuther Tucker, Albany A BIOGRAPHICAL NOTICE, AND AN ACCOUNT OF THE WORKS, Ansvee J, Downing. Anprew Jackson Downna, the most eminent of American horticulturists and professors of Rural Architecture, was born in. Newburgh, upon the Hudson, in the State of New York, Oct. 30,1815. He inherited a taste for horticulture from his father, who about the beginning of the present century abandoned the occupation of a wheelwright ‘for the more congenial employments connected with the duties of a nurseryman, which claimed his attention until his death in 1822. - ; Some years after this event Andrew was placed at an academy i in ‘Montgomery, in the vici- nity of Newburgh, where he continued until he had attained the age of sixteen. He had ac- quired a sufficient taste for his studies to earnestly desire opportunities for their prosecution at college, but, as the execution of this plan did not comport with family arrangements, the youth remained ‘at home, and assisted his brother in the care of the nursery. ' Much of his leisure time was occupied in rambles through the surrounding country, which tended to strengthen and educate that taste for botany and mineralogy which he had evinced from an early age. In these excursions he profited by'the instructions of his companion, the Baron de Liderer, the Austrian Consul-General, a summer resident of the neighborhood, who was much attached to the sciences which had awakened the untaught enthusiasm of young Downing. When wearied with wandering among the hills and valleys of the Hudson, | his hours of study were devoted to maturing his knowledge of landscape-gardening and rural architecture, in which branches he subsequently attained such well-earned distinction. His first essay in building was the erection of a house upon his own _grounds, in the Elizabethan style, whith successful attempt to embody his conceptions of art ‘greatly tended to extend that reputation which his known talents and energy had already gained in the surrounding country and among his more distant acquaintances. In 1841 he*published a work, which at once made him known to many thousands who never had the opportunity of listening to his oral teaghings upon his favorite pursuits. This was his Treatise on ‘Landscape-Gardening, to which we shall have occasion to refer presently, together with other works which amply sus- tained his character as an intelligent and attractive writer. In 1836 he was invited by Mr. Luther Tucker, of Albany, to assume the duties connected with the editorship of The Horti- culturist, just established in that city. The proposition was accepted, and the journal con- tinued under Mr. Downing’s charge until his death. The admirable contributions of the editor have since been collected, and were published in 1853 in a handsome octavo volume, edited, with a Memoir of the Author, by George William Curtis; and including a Letter to Downing’s friends by Frederika Bremer. To Mr. Curtis’s volume, to which we are indebted for the above facts, we must refer the reader for further particulars connected with the life of the subject of our notice. The fearful manner of his death is well known. He was one of the victims on the melancholy occasion of the burning of the steamer Henry Clay, on the Hudson, July 28, 1852. Mr. Downing may well be styled a national benefactor. If, as the poet tells us, “A thing of beauty is a joy forever,” what gratitude is due to that man who causes the land to smile with gardens, and ornaments every roadside with homesteads of architectural symmetry! This is a tempting subject, but our limits forbid indulgence. The works of this gifted artist, which we are now about to i 5 6 THE YEAR-BOOK OF AGRICULTURE. enumerate, with the citation of some opinions upon their merits, should be in the possession of all who love flowers, and can appreciate the pleasures connected with refined taste. 1. A Treatise on the Theory and Practice of Landscape-Gardening, adapted to North Ame- rica, with a view to the Improvement of Country Residences. With Remarks on Rural Archi- tecture, New York, 1841, 8vo. Sale in America to 1853, 9000 copies. ‘Mr. Downing has here produced a very delightful work, and has convinced us that sound criticism and refined taste are not confined to this side of the Atlantic."—London Art Union Journal. “A masterly work, * * * We have quoted largely from this work, because in so doing we think we shall give a just ides a the great merit of the suthor. "— Loudon, editor of Repton’s Landscape-Gardening. **Qn the whole, we know of no work in which the fundamental principles of this profession are so well or so concisely expressed. * * * No English landscape-gardener has written go clearly or with so much real intensity.” —Dr. Lindley, in the Gardeners’ Chronicle. “The standard work on this subject.” —Silliman’s Journal. 2. Cottage Residences, 1842, 8vo. Sale in America to 1853, 6250 copies. ‘It cannot fail to be of great service.” —Loudon. ‘“We stretch our arm across the ‘big water’ to tender our Yankee coadjutor an English shake and a cordial recognition.”—An English Horticultural Critic. 8. The Fruits and Fruit-Trees of America, 1845, 8vo. Sale in America to 1858, 15,000 copies. “‘Downing’s Fruits and Fruit-Trees of America deserves to be more generally known in Europe.”—Triibner’s Bibliographical Guide to American Literature, Lon., 1855, 12mo. 4, Hints to Young Architects, by George Wightwick, Architect; with additional Notes and Hints to Persons about building in this country, by A. J. Downing, 1849, 8vo. 5. The Architecture of Country-Houses; including Designs for Colleges, Farm-Houses, ‘ad Villas, 1850, 8vo. Sale in America to 1853, 8500 copies. 6. Mrs. Loudon’s Gardening for Ladies; edited by A. J. Downing, 1852, 12mo. 7. Rural Essays, by the late A. J. Downing, edited by George Wm. Curtis, with a Memoir of the Author; and a Letter to his Friends, by Frederika Bremer, 1853, 8vo. This work con- tains, with one or two exceptions, all of Mr. Downing’s editorial papers in the Horticulturist. A few additional testimonies to the eminent services rendered by Downing to the beautiful pursuits in which he found such enthusiastic enjoyment may properly conclude this notice: “Mr. Wilder says that a gentleman ‘who is eminently qualified to form an enlightened judg- ment’ declared that much of the improvement that has taken place in this country during the last twelve years, in rural architecture and in ornamental gardening and planting, may be ascribed to him, [Downing.] Another gentleman, speaking of suburban cottages in the West, says—‘I asked the origin of so much taste, and was told it might principally be traced to Downing’s Cottage Residences and the Horticulturist.’”—-Memoir, by G. W. Curtis. ««By these admirable works, [Fruits and Fruit-Trees of America, and Landscape-Garden- ing and Rural Architecture, ] Mr. Downing has done much to promote the best and most judi- cious selection and culture of fruit-trees. It is one of the most common and earnest long- ings of the toiling residents of cities to be able one day to return to a snuggery in the country; and these admirable works will both minister to these longings, and teach how to realize them satisfactorily.” —President King, of Columbia College, New York. For the above carefully-prepared sketch of A. J. Downing, we are indebted to 8. Austin Allibone, Esq., of Philadelphia, author of that very valuable work, the ‘Critical Dictionary of English Literature and British and American Authors.”—Zd. Year-Book. A REVIEW BY THE EDITOR OF THE BProgress amd Prospects of Agriculture. Never, in the history of our country, has Agriculture, i in all its great and varied depart- ments, presented so prosperous and promising a condition as at the close of the year 1855. The seagon that has passed, in striking contrast with that which immediately preceded it, has proved fruitful to an extraordinary degree, and the careful estimates of the gathered crops almost exceed belief: Indian corn, ten hundred millions of bushels; wheat, from one hundred and sixty to one hundred and eighty millions; oats, four hundred millions; rye and other grains, one hundred millions; and cotton, with a crop undoubtedly smaller than that of some former years, not less than three million two hundred thousand bales, or, estimating four hundred pounds to the bale, one billion two hundred and eighty millions of pounds. With this increase in material prosperity, a marked progress has also been made in all that pertains to agriculture, considered as a science and an art—in the improvement and perfec- tion of tools, implements, and processes—in the increase and improvement of agricultural literature—in the introduction and propagation of new and valuable animals and plants—in the increased patronage of the National and State governments—and in the more widely ex- tended means and opportunities for elementary agricultural education. Nor has this progress and improvement been confined to the United States. In Great Britain, the examples and teachings of Mechi, Wilkins, Lawes, and Gilbert, the late Mr. Pusey, Prof. Way, of the Royal Agricultural Society, Prof. Anderson, of the Highland Agri- cultural Society of Scotland, and many other practical, far-seeing men, are producing most beneficial results. Their efforts are also indirectly seconded by the manufacturers, as in the case of Mr. Salt, who has introduced the Alpaca sheep and Angora goats, and by others who utilize the refuse of their vast manufacturing establishments for fertilizers; or by their statesmen, as in the case of Lord Clarendon, who, while Foreign Secretary, did much, in virtue of his position, to facilitate the introduction of foreign trees and fruit. In France, under the direction of St. Hilaire and the patronage of government, the Society for the In- troduction and Acclimation of Useful Foreign Domestic Animals and Plants, are active and strenuous in their efforts. Under the direction also of government, aided by private indivi- duals, the streams and lakes of the empire are becoming rapidly stocked with a profusion of fish, propagated by artificial means. American agricultural implements—partially through the results of the Great Exhibition of Paris, partially through an increased information—are finding a ready market in France, and in Vienna a warehouse for their exclusive sale has been established. Lastly, but not least, it must be recorded that Algeria, best known to American readers by its former piracy and white slavery, competed honorably with the United States at the Paris Exhibition in reaping machines; that the National Agricultural Society of the Sandwich Islands, during the past year, has issued its third annual report and awarded six hundred dollars in prizes, and that Liberia has established a model farm and plantation. Let us, however, examine in detail some of the varied and interesting incidents that have been recorded during the years 1854-55: As regards agricultural education, many important steps and prosperous beginnings have been made during the past year in the United States. In Georgia, through the munificence of the late Dr. William Terrell, the University of that State has been endowed with $20,000 : 1 8 THE YEAR-BOOK OF AGRICULTURE. for the purpose of establishing a Professorship of Agriculture, and the trustees have elected to the chair Dr. Daniel Lee, former editor of the Genesee Farmer and Southern Cultivator. In Massachusetts, arrangements have been made, in connection with Amherst.College, for the instruction, in agriculture and its kindred sciences, of young men, not permanentl; members of the college, but who may resort to it, for longer or shorter periods, at pleasure, for this specific purpose. This department is under the special direction of the well-known agriculturist, Prof. J. N. Nash, editor of the- Valley Farmer, and. the Rev. Dr. Hitchcock, formerly President of the College. The plan of instruction embraces @ full course of lec- tures on the natural and physical sciences, and lectures and recitations on practical agricul- ture and the application of science to rural affairs. The legislaturé of Michigan; at its last session, passed an act establishing an agricultural college in that State. This act provides that the site for an agricultural icollege shall be purchased within ten miles of the capital of the State, of not less than five hundred acres, nor to exceed one thousand; that twenty-two sections of Salt. Spring lands shall be. appro- priated for the purchase of the land, erection of buildings, and all other necessary expenses to be incurred in. the establishment and successful operation of said college; that the purpose of the school shall be to improve and teach the science and practice of agriculture ; and that the course of instruction in said college shall include the following branches of education— viz., natural philosophy, chemistry, botany, animal and vegetable anatomy and. physiology, geology; mineralogy, meteorology, entomology, veterinary.art, mensuration, levelling, political economy, book-keeping, and the mechanic arts connected with agriculture. The tuition is to be forever free to pupils within the State. During the summer scholastic term, or from the beginning of Apra to the end of October, the pupils are to be required to devote not less than three nor more than four: hours to manual labor, no student to be exempt except in the case of sickness or other infirmity. The legislature of Massachusetts, at the last. session, passed an act incorporating the * Boston Veterinary Institute,” which has since heen organized in the.city of Boston. The object of the institute is to afford ample instruction.to persons desirous of qualifying them- selves for the practice of veterinary medicine and surgery. The plan of instruction includes lectures'on the anatomy end physiology of the horse, on the theory and practice of veterinary medicine and surgery, and on cattle pathology. . Students will also be allowed to attend the lectures on chemistry.and pathological anatomy in the medical department of Harvard Uni- versity, and clinical lectures will be given by the faculty. The officers of the institute con- sist of the following gentlemen: D. D. Slade, M.D., President; George H. Dodd, Prof. of Anatomy and Physiology; Charles M. Wood, Prof. of Theory and Practice; Robert Wood, Prof. of Cattle Pathology. D. D. Slade, M.D., John. W. Warren, M.D., al Barilett, M.D., and-Charles Gordon, M.D., Board of Examiners. ' In 1852, a charter for an agricultural college was granted by the legislature of New York, chiefly by the agency of the late Hon. John Delafield, of Fayette, Seneca county, New York. It had been contemplated to build the college on Mr. Delafield’s farm, and progress had been made to that effect by the procurement of some thousands of dollars, when the project was interrupted by Mr. D.’s sudden demise. Recently, the trustees of the institution have con- sented to its removal to the town of Ovid whenever the sum of $40,000, required by their by-laws, shall have been secured to put it-on an enduring basis. This site is central, beau- tifal, and healthy—one of the best, it ig believed, that the State affords, and the people here have a mind to the work. On the ist of August, 1855, a meeting of persons interested was held in the town of Ovid, to confer together on the subject, and to assist in devising plans for the promotion of the institution. Addresses were delivered by various individuals, and resolutions were adopted in favor of raising the sum of $200,000 for the purpose of carrying out the work; of this amount the town of Ovid was pledged for $10,000, and Seneca county for $30,000. For the purpose of establishing an agricultural department of the academy at Westfield, Massachusetts, Stephen Harrison, of that place, bequeathed, during the past year, $5000. In 1844, an agricultural department was established in connection with the college at Oberlin, Ohio, and a successful course of lectures given in connection with other instruction. PROGRESS AND PROSPECTS OF AGRICULTURE. 9 At the last session of the Ohio legislature, an institution, bearing the name of the “Ohio Agricultural College,” was incorporated and located at Cleveland. In order to unite the energies of all interested in agricultural education, it has since been determined to transfer the agricultural department of the college at Oberlin to the new institution at Cleveland, which, under favorable auspices, will commence its course of lectures and instruction on the 1st of December, 1855. The following board of officers and instructors have been elected : Harvey Rice, Esq., President; Professors,—J. P. Kirtland, §. St. John, N. 8. Townshend, J. Dascomb, and J. H. Fairchild. The education course which has been proposed embraces the following subjects :—— Ist. Those that relate to the land.—Geology, mineralogy, chemistry, &c. 2d. Those that relate to plants.—Botany and vegetable physiology, field crops, orcharding, gardening, &c. 3d. What relates to animals.—Comparative anatomy and physiology, natural history of do- mestic animals, veterinary medicine, insects, &c. 4th. What relates to labor.—Rural archi- tecture and landscape ‘gardening; draining, use and construction of implements, surveying, farm book-keeping, &c. &c.: A reading-room, supplied with agricultural papers and jour- nals, are additional facilities offered to the ‘student. The price of tuition for the entire course is $40. ; A “ Farmers’ High School,” incorporated by the legislature of Pennsylvania in 1855, was organized at Harrisburg, Pennsylvania, in June last. - The trustees are empowered to make choice of a suitable location, embracing not less than two hundred nor more than two thou- sand acres; and also to choose a principal and other officers and assistants of suitable prac- tical and scientific attainments, as well as make whatever arrangements the nature of the institute may require. The State Agricultural Society is authorized to appropriate any sum not exceeding $10,000, whenever the school may require it, and also to make annual appro- priations according to the extent of its resources. ? The Gardeners’ Educational School, established some years ago by the Belgian government, and located at Ghent, under the superintendence of the celebrated horticulturist, Van Houtte, is fulfilling the most sanguine expectations which have been formed concerning it. The young men, admitted between the age of fifteen and twenty, receive instruction, board, and lodging in the establishment. The expense is-500 francs per annum. The course of lectures and instruction lasts three years, and comprises all matters which, in every way, an accomplished gardener ought to know. The professors are appointed and paid by the Belgian government. The institution is equally open to foreigners as well as citizens of Belgium, and, although but recently established, has already pupils from many different nations. The arrangements of the school comprise spacious lecture-rooms, sitting-rooms, and dormitories for the pupils, a rich garden, museum, library, and ‘herbarium, together with the immense horticultural establishment of Van Houtte, where every branch of the business is carried on on a great scale—itself the best practical school for young gardeners. The Union Agricultural Society of Virginia and North Carolina, whose members reside partially in Virginia and partly in North Carolina, have recently raised the sum of $20,000, and established a model and experimental farm, in the immediate vicinity of the city of Petersburg, Virginia. This society embraces within its organization the border counties of Virginia and North Carolina, i.e. what is called the south side of Virginia, (from James River south,) and all that portion of Carolina which finds a market at Petersburg. The limits of the farm are about one hundred acres, embracing a considerable variety of soil, a portion of which has been slightly improved by former applications of marl and lime; but, as a whole, its present condition affords an ample field for experiments in the improvement of worn-out land, by the judicious application of manures, deeper and more perfect tilth, subsoiling, under-draining, &c. Operations were commenced upon the farm, under the superintendence of Mr. Nicol, one of the editors of the Southern Farmer, about the commencement of the present year. During the past season, the suitable buildings, offices, and fences have been erected, the farm laid out, trees planted, and some progress made in the course of practical experimentation. Thirty acres were seeded with various kinds of oats, and treated with different manures, and in va- ried quantities; (the results will be found in the present volume, department of Agricultural 10 THE YEAR-BOOK OF AGRICULTURE. Chemistry.) Twenty-five acres were planted with different varieties of corn, and treated differently with various manures. The same course has also been followed with twenty acres of wheat, Thus far, the greatest success has attended this novel enterprise, which may be regarded as one of the most important steps taken for the advancement of American agriculture during the past year. As its objects are by no means local or sectional, it has claims upon the interests of the whole country; and American agriculturists, in possession of choice seeds, fruits, &c., will do no more than their simple duty in sending specimens to the superintend- ent, Mr. Nicol. Under the auspices of the late Commissioner of Patents, Judge Mason, great activity has been displayed by the Agricultural Department of the Patent Office. for manure. Now, con- sidering the large proportion of oil in fish, it became important to consider of what value it might bein manure. It had become the fashion of late years to give too exclusive a con- sideration to the importance of nitrogen in-vegetation; not that we could too much value this important element, but that we were in dénger of neglecting those substances which took a less prominent, but a no less necessary part, in. the economy of vegetation. That carbona- ceous matter in the soil was beneficial, if not indispensable, to profitable cultivation, did not seem to admit of a doubt; and if so, there might be clearly a choice between carbonaceous substances, according to their rate of decomposition, &c. Now oils were .very susceptible of oxidation, with the production, of course, of carbonic acid: He might only mention in illustration, the spontaneous combustion often occurring when oily rags used for machinery, &c. had been thrown into a heap, and by the absorption of oxygen and heat consequent thereupon, it had, in many cases, caused great destruction of property. Then again, the manufacture of ‘drying oils,”’ as they were called, by boiling linseed and other oils in contact with the air, the experiments of Saussure, who placed different oils under receivers of air, and found at the end of the experiments that all the oxygen had become carbonic acid at the expense of the oil, were also to the purpose. Now it was easy to see that oil distributed through a porous soil would, on account of the great surface exposed, suffer rapid oxidation, and give off a ready supply of carbonic acid, which at par- ticular periods of their growth might be most important to some plants. Mr. Way quoted passages from the work of Dr. Home, printed in 1762, and the “‘Georgical Essays”? of Dr. Hunter, a few years later, to show that a very high opinion of the value of oil as manure was held by early writers. He also referred to the experiments of Earl Spen- cer with oil, to the use of whale-blubber, which, however, no doubt owed much of its value to the flesh. He showed also that many of the shbstances known as powerful manures, and containing nitrogenous matter, also contained oil. Thus woollen rags, rape-cake, &c. might owe part of their efficacy to this cause. Rape-cake contained about 4 per cent. of nitrogen, while its oil varied from 12 to 15 per cent. On the whole, this subject of oil, as manure, was well worth looking ines not that oil would be likely to be used directly as a manure, (its value for other purposes being opposed to such a use of it,) but that we might be able to value more correctly substances in which occurred, and could not profitably be extracted, as suitable for manure. The other main ingredient of fish was the ash or mineral matter, which, although of less importance than the others, (on account of the smallness of its. proportion,) was not to be overlooked. Mr. Way here referred to the analyses of different fish, showing that in' the lobster the quantity of phosphate of lime was as much as 5 per cent. of the fish in its dried state, and about the same in the mackerel: this phosphate of lime could not be without its use. ; Mr. Way next directed attention to the various methods of preserving fish that had been proposed, including those of Mr. Petit, by sulphuric acid; of Mr. Elliott, by the use of alkali; of Mr. Bethell, by the employment of tar-oils; and of M. de Molons, by treatment with high- pressure steam. He also mentionod the plan which was adopted by a manufacturer of manure, (Mr. Stevens,) who had a contract for the refuse fish of Billingsgate market, of incor- porating the fish in super-phosphate’ of lime, the quantity of water in the fish serving to dilute the acid, and being dried up by the natural heat of the process. He remarked, how- ever, that there would be no difficulty in preserving the fish, if it could be obtained. It-was not so much a question of this or that process, but of the supply of raw material. He could not help believing that this was not an insuperable difficulty, if systematic measures were taken to effect the purpose. Was it affirmed that our system of taking fish was incapable of AGRICULTURAL CHEMISTRY AND GEOLOGY. 157 improvement? Were the nets and other appliances of the fisherman, which were the same in kind as we read of 1800 years ago, although possibly improved in detail,—were they the last and supreme effort of ingenuity and invention? Was nothing to be accomplished in the way of extracting from the waters of the sea a greater supply of its teeming population? Surely it was open to improvement. But it seemed to him that the calculations and argu- ments on this question were not usually quite to the point. Everybody talked of ‘refuse’ fish, that is to say, the offal of edible fish, and the fish accidentally caught which were unfit for the food market; and it was said by those who certainly well understood the subject, ‘‘a boat with so many men will take in the day such-and-such a quantity of fish, of which the uneatable fish will amount to so-and-so, and that quantity will not keep a factory in work or create a manufacture of any national importance.’’ But he said that fishing for manure must be the primary, and the capture of edible fish the secondary, consideration, if they desired to raise this into a great national question. And we had yet to learn what would be the result of a day’s labor of a given number ef men, when their attention was directed, not as now, to the comparatively rare and valuable fish, but to those which hitherto they had despised and avoided. In his opinion, the statistics hitherto put forward were worth nothing, because they were not derived from this point of view. In the search after fish for the manufacture of manure, the proverb that ‘All is fish that comes to the net’ ought to be varied to ‘All is fish that the net can reach.” Prof. Way concluded his lecture, as he had begun it, by urging the necessity of encourag- ing every attempt to obtain new sources of raw material for the manufacture of manure. Without. this, a term would be reached when the competition for manufactured manures, with an insufficient supply, would raise the price up to the extreme limits at which their use would be remunerative; for a time the deficiency would be met by adulteration and inferiority of the article; and this, together with the scramble to get manure, would soon wean farmers from their partiality to artificial manures. Then, indeed, the progress of agriculture in this country, at all events in the use of artificial manures, would receive a serious check. He did not wish to draw a gloomy picture, but such a state of things must inevitably result, if the increasing demand for manures were not met with some new and abundant supply, of the raw material. Farmer's Magazine. Sewage Manure. Tomas Wicxsrunp, of Leicester, England, has secured « patent for making sewage manure, by mixing charcoal reduced to fine powder with milk of lime, of the thickness of cream, and then causing this mixture to flow into a stream of the sewage water by means of pumps. A Fact in Manuring. _A PERSON carrying some orange-trees from China to the Prince of Wales’ Island, when they had many hundred fruit on them, expected a good crop the next year, but was utterly disappointed; they produced but few. A Chinese, settled in the island, told him if he would have his trees ‘bear, he must treat them as they were accustomed to in China; and he described the following process for providing manure:—“ A cistern, so lined and covered as to be air-tight, is half-filled with animal matter; and to prevent bursting from the genera- tion of air, a valve is fixed which gives way with some difficulty, and lets no more gas escape than is necessary: the longer the manure is kept the better, till four years, when it is in perfection; it is taken out in the. consistence nearly of jelly, and a small portion buried at the root of every orange-tree, the result being an uncommonly great yield.” A person hear- ing of the above fact, and wishing to abridge the term of the preparation, thought that boil- ing animals to a jelly might have a similar if not so strong an effect. Accordingly, he boiled several puppies, and applied the jelly to the roots of. a sterile fig-tree: the benefit was very great, the tree from that time for several years bearing in profusion. Hints of this kind are well worth preserving, for though a farmer may neither have the apparatus of the Chinese, 158 THE YEAR-BOOK OF AGRICULTURE. nor puppies enough to become an object of attention, yet the reduction of manure to a muci- laginous state ought perhaps to be carried further than it is,—Horticulturist. How to Use Guano. Tae London Mark Lane Express, gives the following directions respecting the use of guano. : First.—Never mix it with any thing; all lime, compost, ashes, and similar ingredients, too often contain enough caustic alkali to drive off the ammoniacal parts before the soil can surround and absorb them. A vast amount of mischief and loss often follows this sad mis- take. If applied alone, the soil will best adapt it for plants. Second.—Mix as much as possible with the soil, not too deeply, but plow it in after sowing it broadcast, unless it be for beans or drilled and ridged crops, when it may be sown on the surface before the ridges are made. Third.—If applied as a top dressing, always apply it, if possible, before rain, or when snow is on the ground; .and if on arable land, harrow, hoe, or scuffle, if possible, immediately after the operation. Fourth.—The best mode to apply it is by water. A slight solution of it is by far the most powerful and speedy application. Fifth.—If sowed with drilled grain, or indeed any seed whatever, it should never come in contact. Itis nota bad plan to sow broadcast, after the corn-drill, and then harrow, as it is kept in the nearest proximity to the seed, without coming in contact with it. . Lastly.—Be sure to get, if possible, the genuine article; cheap guano there is none. The quantity of genuine guano per acre used is from two to three hundred pounds. The latter quantity, when the land is deficient and requires speedy renovation. Guano Deposits of the Atlantic. Ir is now well known that the guano of the Chincha Islands and other sources, under rain- less skies, is » product of a peculiar fermentation, in which ammoniacal salts and nitroge- nous products are formed from a variety of animal matter. Not only the dung, bodies, and eggs of several varieties of birds, but a large amount of flesh and bones of seals, make up the substance of the decomposing mass. é On the islands of the Atlantic, the dung, bodies, and eggs of birds are found; but the frequency of rain modifies the decomposition, so that the resulting matter differs essentially from that of the Peruvian shores. It possesses, however, a high value in special applica- tions, and presents some interesting scientific points. Dr, A. A. Hayes, of Boston, has fully investigated the composition of the guanos of different islands, including ancient as well as recent deposits. On some of these, two species of birds are still found in countless numbers, which make daily additions to the accumulated remains of former years. The substance of this kind of guano is matter derived from the fish-food of birds. Its color is light, yellowish brown, becoming, when air-dried, nearly white. It has no ammo- niacal odor, but smells strongly of freshly-disturbed earth. It is never so finely divided as the Peruvian, its particles being sometimes as coarse as mustard-seed, resembling closely the sand from oolite limestone. There is, however, always some finely-divided organic matter, in the state of humus, either between the particles or making part of the substance of them. An average composition is the following : Moisture after being sir-dried........40.ssesessos cesses saeerseee ee a vijassvavavectanesetovasseese Bt40 Organic matter, crenates, humates, oleates and. stenrates, magnesia and lime.. Bone phosphate of lime.. Carbonate of lime.. Phosphate meoen . Sulphate lime... Band....s000 o AGRICULTURAL CHEMISTRY AND GEOLOGY. 159 The carbonate of lime here given is an essential part of each particle of the bone re- mains, and does not exist, except occasionally as mixture to the amount of one or two per cents., independently. The humic acid is often in union with ammonia and magnesia, the whole percentage of ammonia, or rather nitrogen, not exceeding in the ancient deposits more than two per cent. A more solid aggregate of grains afforded— Moisture from air-dried state....s.secseccorecescccsesees « 5°40 Organic matter, humates, humu Oleates and stearates...... Bone phosphate lime... Carbonate of lime.. * 8-40 Sulphate......ccsceee 2°80 Phosphate magnesia. aia -- 160 Sand........008 Jensvassveeerens oO nescnsees veneacees cecses seeuss seenessan snasesencceuene conenecusnen teasassesees 46 99°66 The grains adhered slightly ; the dry mass was of a pale, nankin color, and exhibited the first step in a change which results in a consolidation of the arenaceous remains into a solid rock. It will be observed that, if we admit the moisture and organic matter, there are seventy- five parts of bone phosphate of lime in one hundred of the dry guano, constituting a source _of this prime requisite in the constitution of fertile soils highly important. From the nature of the decomposition, this bone phosphate is soluble to some extent in water, and thus adapted to application when the immediate effects are desired. Comparing the composition here given with that of fish-bones, we observe an increased ‘amount of phosphate of lime, and are led to the consideration of the cause of this anomalous composition. - ‘ Another variety of this guano appears as a solid compact rock, banded in lines by dark- brown colors. Although the irregular forms of the masses mark it as an aggregate, its hard- ness, next to that of feldspar and greater than that of fluorspar, removes it from the class of ordinary calcareous aggregates. But the chemical composition is more remarkable. One hundred parts afford— if Moisture from air-dried state.......csrseccsccercacseecesensees corcvcocesesenesoesssseseveseveeseeeses — 0°80 Organic matter and water.. - 11-00 Bone phosphate of lime.. 110-20 Sulphate of lime......... 790 Sand and Girt ....cccrccccsecssccscecscesseenascnssensen socscoees conncenes soseceves gees: “80 130.70 The 50-47 parts of phosphoric acid are, for convenience of comparison, supposed to be united with lime to constitute bone phosphate of lime. For economical purposes, it is neces- sary to grind the masses to a fine powder; it then dissolves slowly in water. This compound generally forms a covering of ten to twenty-four inches thick over the guano on those islands not frequented by birds. Some rough masses are found in the mass of the arenaceous guano; but they appear to have been once a surface-covering. « Dr. Hayes explains the singular composition of this aggregate and the guanos more rich in bone phosphate than the bones of birds by referring to the kind of fermentation which organic animal matter undergoes in presence of excess of humidity. Briefly, it is the reverse of that which produces ammonia salts in the Peruvian guano, acids being the result here. The whole series of acids, the products of humus decomposition, carbonic acid, and probably acetic acid, being generated in the mass, have dissolved the carbonate of lime of the deposit, while the resulting salts have been washed away by the rains, leaving the phosphate of lime in excess. Where daily depositions are taking place, this effect does not follow, as the first de- composition produces ammonia; but, under other conditions, the carbonate of lime of the bony structure is removed, and the phosphate is left in excess. The occurrence of rocky masses at the surface is explained by the well-known fact that the solutions of salts formed tend to the surface; and, as the water evaporates under the sun’s rays, the earthy salts dissolved by the acid fluids below are left in the interstices existing in the sand-like deposits of food-remains until they are filled, and every trace of granules ob- literated. The increased amount of sulphate of lime, the uniform acid state of these guanos 160 THE YEAR-BOOK OF AGRICULTURE. and cavities lined with crystals, are all according facts in favor of the conclusion adopted, The experiments, in their extended application to other aggregates, are proving that many compact rocks may be formed at common temperatures by w similar action, not always in- volving a chemical solution of the materials. On the Mixing of Common Salt and Guano. Tue following experiments, performed by Mr. Barral,-editor of the Journal d’ Agriculture Pratique, prove the value of common salt as a fixer of ammonia. M. Barral took two sam- ples of guano: the one he kept pure—the other he mixed with a refuse salt obtained in the manufacture of gunpowder, (and consisting principally of common salt with a small quan- tity of saltpetre, nitrate of potassa,) in the proportion of 50 per cent. of this salt. ‘The sample of pure guano which we analyzed,” says M. Barral, “‘contained 12-56 per cent. of nitrogen; the sample mixed with salt contained only 6-23 per cent. We do not take into account the nitrogen in the state of nitrate mixed with the salt. We subjected equal weights of the two samples to heat for three hours in the same stove, in a current of air, maintained at 100°. They were spread out so as to have the same thickness, and occupy an equal sur- face, and they had been equally pulverized. At the end of the three hours, on examining the two samples, we found that the pure guano had lost 5-7 per cent. of its nitrogen, while the mixture had lost only 1-9 per cent. of its nitrogen. “Though this experiment appeared to us to be in favor of the preservative power of salt, we repeated it under another form. We left in the open air, in plates, during fifteen days, equal weights of the pure and the mixed guano. At the end of that time we examined anew the amount of nitrogen, and found that the pure guano had lost 11:6 per cent. ofits nitrogen ; while that mixed with salt had lost only 5 per cent. Thus we see salt can be usefully employed for mixing with guano.” This property of salt, as a fixer of ammonia, has not been sufficiently attended to in agri- culture. While chemists recommend gypsum, nitrate of lead, chloride of zinc, sulphate of iron, and chloride of manganese for this purpose, common salt is but rarely alluded to. It has been used extensively of late, with nitrate of soda as a top dressing, with the view of strengthening the straw of the cereals. It has been alleged that guano tends very much to increase the. growth of vines.in the potato crop. We are of opinion, from numerous experi- ments before us, that, when: applied to this crop, the guano should always be mixed with some fixer of the ammonia, such as gypsum, salt, or charcoal: at present prices, the most expensive of these, at the rate of one hundredweight per acre, will not cost more than 2s. per acre. Another important fact, independent of the value of the salt, brought out by M. Bar- ral’s experiment, is the great waste of ammonia ‘which takes place on exposing guano to the air. It will be remarked that, in the case before us, upwards of one-tenth of the nitrogen was lost in the course of fifteen days. This shows: the necessity of farmers hus- banding as much as possible this important ingredient of their manure. Instead of throwing their guano in exposed sheds, as is too often done, it should be carefully covered up, and mixed, immediately on their receiving it, with some preserver of its ammonia. Superphosphate of Lime for Root Crops. SupeRPHosPHATE of lime is used to a great extent in England as a manure for turnips, ruta bagas, mangel-wurzels, and other root crops. When sown broadcast, it has very little influ- ence on the crop; but when drilled with the seed its effects are oftentimes astonishing. Philip Pusey and some others have shown, too, that, when the superphosphate is dissolved in water and applied in the seed-drills in a liquid form, the effect is still more beneficial. Alfred 8. Ruston, in the London Farmer’s Magazine, gives the results of some carefully-conducted experiments on the subject. There were seven separate experiments made; but, as the results agree pretty closely, we select one as a sample of the whole. Three plots were dressed with eleven loads of barn-yard manure per acre, thrown into ridges, and sown with mangel-wurzels, April 17th. The first plot received no artificial AGRICULTURAL CHEMISTRY AND GEOLOGY. 161 manure. The second, one hundred and twelve pounds of Lawes’s superphosphate of lime per acre, drilled in dry, and the third plot, one hundred and twelve pounds of Lawes’s superphos- phate of lime drilled in a liguid state. The crops were weighed October 4th, The first plot yielded per acre eight tons and fifteen hundredsweight; the second, thirteen tons and fifteen hundredsweight; and the third, seventeen tons and seven hundredsweight. In other words, one hundred and twelve pounds of superphosphate per acre, drilled in dry, gave an increase of five tons, and the same quantity applied in a liquid state, an increase of eight tons and twelve hundredsweight per acre. The cost of the superphosphate was $1.80 per acre. This is a good result, although it is usually found that superphosphate has a more marked effect on turnips than on ruta bagas, and even still more than on mangel-wurzel. The above yield will appear small to those who are frequently reading of crops of one thousand five hundred to two thousand bushels per acre. The great drought of last year, doubtless, materially injured the crop, especially where no superphosphate was applied. But, as the weather in England last summer approximated more closely to what it usually is in this country, the experiment may be looked upon as pretty correctly indicating what would be the effect of an application of good superphosphate of lime, in a dry and in a liquid state, to mangel-wurzels in this climate.—Albany Cultivator. Amount of Manure applied per Acre. Tue following, from the Rural New Yorker, displays the minute quantity of concentrated manure which falls upon a square yard of surface-soil when applied at ordinary rates :— An acre of land contains forty-three thousand five hundred and sixty square feet, four thousand eight hundred and forty square yards, or one hundred and sixty square rods. By those who have used guano, it is said three hundred pounds is sufficient to manure an acre; two hundred and two pounds would give just one ounce avoirdupois to the square yard. One cubic yard would give a trifle over one cubic inch to the square foot. A cubic yard of highly- concentrated manure, like night-soil, would, if even and properly spread, manure an acre very well. A cubic yard of long manure will weigh about one thousand four hundred pounds; a cubic foot not far from fifty.:pounds. A cord contains one hundred and twenty- eight cubic feet; a cord and a quarter would give about a cubic foot to the square rod. If liquid manure be used, it would take one hundred and seventy barrels to give one gill to a square foot upon an acre, which would be equal to about fifty pipes or large hogsheads. It would be quite useful if farmers would be a little more specific as to the amount of manure applied. Natural Supply of Ammonia in Ordinary Soils. At a recent meeting of the Royal Agricultural Society, Professor Way, in the course of some remarks on the atmospheric supply of manuring or fertilizing matter, called attention to the large amount of ammonia, constantly taken up by the soil, and washing into the land by rain, and to the great importance, consequently, of exposing the soil in such a manner to atmospheric influences a3 may best tend to this ammoniacal absorption. Fallowing of land, he remarked, had given way to rotation of crops; but that there was no such thing as such a simple resting as fallowing was supposed to imply in this case, for an alteration of the soil under the influence of oxygen was constantly going on. Every interval, even, between one crop and another, was in reality a fallow. Land should be laid up as lightly as possible, for the purpose of its aeration. The working of the land, with a view to this abundant aeration, was one important means of improvement. He regarded it as indispensable, to the full de- velopment of the powers of soil, that steam-power should be brought to bear effectively upon its cultivation. The amazing bulk of ammonia locked up in the land itself could not be taken up by plants, and would therefore remain in a form unavailable for vegetation, unless the management of soil tended to release such manuring matter, and bring it within reach of the roots. He had calculated, from data farnished by some rich loamy land of tertiary drift, that the soil within available depths contained ammonia at the rate of one ton (equal 11 162 THE YEAR-BOOK OF AGRICULTURE. to six tons of guano) per acre. This was a stock of wealth which would repay the most active measures being taken for its release and distribution.— British Farmer. In a lecture before the Massachusetts Legislative Agricultural Society, in the spring of the present year, by Dr. A. A. Hayes, of Boston, substantially the same views were ex- pressed. Dr. Hayes has found, by experiment, that the quantity of ammonia contained in the majority of the soils of New England is very great, far beyond what is generally sup- posed. In the state in which it exists, however, it is unavailable for fertilizing purposes, being combined with vegetable and organic acids, and forming neutral and insoluble salts, In applying manures, therefore, to lands in this state, the object sought for it is to produce a fermentation, or a chemical action, which will break up the ammonia compounds in the soil, and render them available for the support of vegetation. The type of manures best calculated to effect this is dried blood or animal matter, which, under nearly all circumstances, when exposed to ordinary temperatures and moisture, fer- ments most powerfully.—Editor of Agricultural Year-Book. Use of Nitrate of Soda as a Fertilizer. Tue Royal (English) Agricultural Society having offered » prize for a manure equal to guano, at a cost of £5 a ton, Mr. Pusey has shown that the conditions are satisfied by nitrate of soda, and at w charge less than that specified. He says, in illustration, that forty-six acres of land, if cropped with barley, and dressed with seventeen hundredsweight of nitrate, would yield an increase of eighty sacks beyond the quantity usually obtained. A cargo of this fertilizer was brought to England in 1820, but for want of a purchaser, was thrown overboard. A second importation took place in 1830; and from that date up to 1850, the quantity brought from Peru, where the supply is inexhaustible, was two hundred and thirty- nine thousand eight hundred and sixty tons; value, £5,000,000. With the price reduced to £8 2 ton, Mr. Pusey observes—“‘ Our farmers might obtain from their own farms the whole foreign supply of wheat, without labor, and with but a few months’ outlay of capital. I do not mean to say that no failures will yet occur ae we obtain a complete mastery over this powerful substance; but I am confident that, as California has been explored in our day, so vast a reservoir of nitrogen—the main desideratum for the worn-out fields of Europe—can- not be left within a few miles of the sea, passed almost in sight by our steamers, yet still nearly inaccessible, at the foot of the Andes.” ; Experiments with Manures. From the Report of the Superintendent of the Model Farm of the Virginia and North Carolina Union Agricultural Society, published in the ‘Southern Farmer,” we extract the following results of some experiments on oats with various manures :— 200 pounds of Peruvian guano gave 2240 pounds of oats per acre, say 70 bushels. 250 pounds of De Burg’s superphosphate of lime gave 1712 pounds, say 58} bushels. 227 pounds bone-dust gave 1676 pounds, say 52} bushels. An acre without any manure gave 1140 pounds, say 354 bushels. On another portion of the field, which contained 30 acres, where the soil was of ‘‘a slightly lighter texture,” 100 pounds of Peruvian guano gave 1672 pounds per acre, say 52 bushels. 183 pounds of Chilian guano gave 800 pounds, say 25 bushels. 100 pounds of Mexican guano gave 1225 pounds, say 38} bushels. Experiments made last season with artificial manures on carrots, on the State Farm of Massachusetts, gave the following results. The manure was apportioned according to its cost, each acre being dressed with twelve dollars’ worth :— Barn-Yard Manure....s.cessosnce cesses sessesssesvesessesseesscseseeseees 753 PoUNdS per acre. . 660 “ rid Guano......00 as Potagh .....s000 recesses ccessesen 628 De Burg’s superphosphate o: 586“ “« Mapes’s improved ditto 572 “ Reservoir MANUre sisssscosevesencorsssevscsssevscsseeccssrsssscssvesesees G40 “ i AGRICULTURAL CHEMISTRY AND GEOLOGY. 163 Experiment with Nitrate of Soda and Guano on a Peat-Bog. Tue land on which the following experiment was made, was a peat-bog, reclaimed in 1850, thoroughly drained, and six inches of clay applied over the whole surface; the only crops raised upon it had been oats, turnips, and again oats sown out with grass. In March last, I sowed on one portion of the new grass two hundred and twenty-four pounds of nitrate of soda, with one hundred and twelve pounds of salt; on another portion, four hundred and forty-eight pounds of guano; and on the remainder of the field no manure was applied. The nitrate gave, per imperial acre, 6600 pounds of hay, at... piece $56.00 Guano gave 5940 pounds, ValUe.....ccoreccrsessecceear beans a» 50.40 Nothing gave 3080 pounds, “ ,....... sieeees spevedsosneuses indesbeeasises Weeauade seeps Independently of the increase of weight of hay from nitrate, I prefer that manure for either new or old grass, as it appears to require little moisture to put it down to the roots of the plants. A strong dew in the, course of one night appeared sufficient for that purpose, and in about thirty-six hours after its application the grass turned to a luxuriant dark-green color; whereas the guano requires a good shower of rain to put it down: unless it gets such fall of rain, it does little good. My trial of nitrate on oats and barley last year leads me to prefer guano for these crops. I applied one hundred and sixty-eight pounds of nitrate on one portion, and three hundred and thirty-six pounds of guano on another; but the oats, top dressed with nitrate, kept a blueish sort of color throughout the season, did not ripen equally, and left the ear soft; while those which had guano ripened equally, had a harder, crisper ear, and weighed better. The land upon which that experiment was made, had not been previously cropped, and was of a mossy loam, with a mixture of clay.—James Dyce Nicou, in Journal of Royal Agricul- tural Society. Experience in Land Drainage. Tre London Agricultural Gazette gives the following results of the experience in draining on several of the largest estates in Great Britain :— Mr. G. Guthrie states: During the last thirty years I have drained many thousand acres ; the result in all cases was highly satisfactory, the tenants being generally willing to pay 6% or 7 per cent. on the expense, and the advantage to them, I am aware, greatly exceeds that interest. The drainage I have adopted is the parallel system. For some years I have allowed no drainage under 3} feet deep in hard land, and in moss or bog, 43 or 5 feet. At one time (twenty years ago) our drains were only 27 or 80 inches; but experience has shown us the great advantage of deeper drains. Our present drains are 34 feet deep, at 24 feet distance. The direction of our minor drains is with the fall. We do not regard the furrows, thé land in this district being sown out flat. I have used 2-inch and 24-inch pipes for minor drains, and 4-inch to 6-inch tiles with soles for leaders. Collars or socket-pipes have not been used in this district, although I believe they ought to be. We have generally stones thrown out of drains, with which we fix the joints of pipes very firmly. I have not tried the practice of giving air at places to drains, and do not consider it at all necessary. The average number of acres to one outlet I cannot accurately say; perhaps 8, 10, or 12 acres, according to circumstances. In conclusion, I believe there is no expenditure of capital more profitable than that of drainage. The agent of the estates of Lord Yarborough states, that until within the last four years the drains were put in from 16 to 24 inches from the surface; but during the last four years a great part of these have been taken up, and put in not less than 3 feet. No difference is made between arable and grass land. The soil generally is clay, with the subsoil of the same character; where the latter has sand veins, or is at all gravelly, a greater depth is adopted—in some few cases they are 5, 6, and even 8 feet deep, the object being to go wherever the water is. On the strong soils, 3 feet draining is found so far to be effectual; the system is to drain down each furrow, the lands being generally about 8 yards wide. Egg-shaped pipes, 23 inches by 14, without collars, have been partially used; but open tiles (with sides 164 THE YEAR-BOOK OF AGRICULTURE. where necessary) have been more generally used, and are preferred. The average depth of rain-fall in the neighborhood is a little over 20 inches. Mr. G. T. Bosanquet gives the following as the result of his experience in draining; he says: The result of our drainage operations on all descriptions of land has been most satis- factory. I believe nothing pays better than draining land. The drainage adopted has been generally on the parallel system; but that must depend a good deal upon the nature of the ground and the fail, The prevailing depth of the drain is about 3 feet. I have not laid drains quite so near each other on grass land as on arable. The direction of the minor drains has been generally with the fall.. I have found 2-inch pipes answer best for the minor drains; I would not advise that smaller should be used on any ground. I have never used collars, as I think they would have a tendency to displace the pipes and destroy the regu- larity of the channel. I have not sufficient experience to say if there is any benefit by giving air at places to either main or minor drains. The average number of acres dis- charging at the several outlets is about 3 acres, sometimes more. I am quite convinced, from experience, that nothing pays better than draining, if well done, and the drains are not placed at too great a distance. Ihave one field on my estate which was utterly worth- less until drained: it would not grow the poorest grass; it now produces good crops of corn and roots. But I strongly advise that whatever is done in draining should be well and effec- tually done, and that the pipes should never be less than 2 inches. I am of opinion, also, that although the water will find its way down to very deep drains, say 4 or 5 feet, this does not obviate the necessity of close draining. ‘We are also less careful than we ought to be in forming the outlets. Clay-Ball Draining. A puan for draining, entitled ‘‘Clay-Ball Draining,” has been recently patented in England by Capt. Norton, R. A., which consists in using hard spherical balls,of clay as the draining medium. The clay of which the balls are made is moulded by any convenient machinery, preserving the spherical form as accurately as possible. When dried, the balls are burned to a crystalline hardness, so that when deposited in the earth they will literally endure for ages. The size or diameter of these drainage balls must be varied to suit different circum~ stances; but a diameter of four or five inches is the average size preferred. Such balls, when laid in drain cuts in the soil, allow the surface water to descend and pass freely through or between them, and thus get clear off the land. Spherical stones would obviously perform just as effectively as the clay balls, but the latter are preferred, for the reason that in them absolute sphericity may be secured, while that would be impossible even with the use of the smoothest and roundest pebbles. ~~ Fig. 1. is a longitudinal section of a portion of'a field drain of this kind, and jig. 2 is a cor- responding transverse section. A rectangular cut A is first made in the soil B in any conve- nient manner; and when a sufficient depth has been attained, the bottom of the recess is le- yelled off, and made hard and substantial asa base, by laying thereon lengths of slate or other Fig. 1. Fig. 2. conveniently and economically available. material C, filling up the entire width of g the drain cut. In this condition of the = work, a bottom row or layer of spherical clay balls D is laid into the drain, the two diameters of each transverse pair of balls being in the same transverse line of the drain as indicated in fig. 2. This drain is supposed to be eight inches in width, so that two clay balls, each four inches in diameter, suffice to fill it. When the entire base of the drain is thus filled in, a second layer of balls E is set above the lower layer, the diametrical lines of the balls coinciding vertically in the manner shown in jig. 2. This completes the draining medium, and the two layers of bails are then covered over with a cover layer of slates F, to carry the AGRICULTURAL CHEMISTRY AND GEOLOGY. 165 earth thrown in above in levelling and making fair the field. It is preferred that the sod-side of the superincumbent earth should be downwards. This relation of the balls gives a clear thoroughfare for the drainage water through the central space enclosed by each set of four balls, as in fig. 2; at the same time there are three half passages or thoroughfares for the water at the bottom and top of the ball layer, and one half passage on each side. Hence there is always a free passage for the water to drain down, and percolate through the enclosed spaces due to the contour of the balls, getting clear away along the slate base of the drain channel to the main outfall. Captain Norton illustrates his contrivance under several forms, the balls being variously disposed in the drain cuts, while, in one instance, three several sizes of balls are used in com- bination. Drains made in this way always present a full, free passage for the descent of the water, as the spaces between the balls can never be diminished except by the introduction of other solid bodies; and the roundness of the balls is itself a point in favor of the avoidance of such foreign deposits; like the links of a chain, the balls will always conform to the ac- tual surface of the ground, and no sinking can effect any serious dislocation, or prevent the drainage from being full and free. Analysis of the Ashes of Oak and Pine Leaves, and their Comparison with those of Cotton and Corn. Art the request of the Black Oak Agricultural Society, of South Carolina, Prof. C. U. Shep- herd has recently analyzed the ashes of the oak and pine leaves, together with those of the cotton and corn plants, with a view of ascertaining the value of the former as a manure for the latter, so far as the mineral ingredients of the oak and pine leaves are concerned. From the published report of Prof. S. we derive the following particulars :— “The agreement between the ashes of the pine and of the oak leaves, in regard to soluble and insoluble substances, is striking; the ratio being as one to twelve in pine-leaf litter, and as one to thirteen in that of the oak; while a very remarkable contrast subsists between their contents of carbonate of lime and magnesia and of silica. The carbonate of lime and of magnesia in one hundred pounds of oak-leaves is six times greater than in the same weight of pine-leaf, while the silica of the latter surpasses that of the former by two and a half times. In all other respects the difference between the two species of ash are inconspicuous. “Prof. Shepherd states that one hundred pounds of pine or oak leaves contain but one- third the quantity of the highly-important alkaline carbonate requisite for one hundred pounds either of cotton or corn; but as this ingredient is afforded to some extent by all clayey soils, through the gradual decomposition of the feldspar and mica they contain, it seems probable thet this amount of leaf-litter would be adequate to maintain the soil in fertility for both of these crops.* Table, showing (in pounds and decimals of pounds) the Mineral Constituents in 60 pounds Indian Corn, in 60 pounds Pine-Leaves, and in 60 pounde Oak-Leaves: Pine- Oak- Corn. leaves. | leaves. Ibs. Ibs. Tbs. Potash .....seeceeseaseaseseassoseenseeree 0-1111 0-0596 0-800 Phosphate lime and magnesia..... 0:1766 0-1566 0:223 Carbonate lime and magnesia..... 1:0265 0°1987 1:172 SiLICA vee cesensssenccesscseccsersrerees | 072192 0°5647 0-267 Sulphate potash.......0. anneronad émae 0-0127 0°0082 0-042 «Qne hundred pounds (or rather one hundred and ten pounds, making allowance for hygro- metric moisture in the atmospherically dry leaf) of either of these kinds of leaf-litter will fully supply the phosphates indispensable for the same weight of cotton and corn; while of the less important carbonates of lime and magnesia, it will (except in the case of the pine- leaf for cotton) generally give a large surplus. In the one hundred pounds of pine-leaves, * Still it might be useful to add, along with this quantity, all the wood-ashes at command upon the plantation. These usually contain about fifteen per cent. carbonate potash, 166 THE YEAR-BOOK OF AGRICULTURE. — there are threé times too much of organized silica for corn, and forty for that of cotton. In the one hundred pounds of oak-leaves, there is only a sufficiericy of the same element for the corn, but eleven times more than is needed for the cotton. Of sulphate of potash and the chlorides, the one hundred pounds of leaves of either kind will supply all that is demanded by either crop, in like quantity. On the Absorption of Nitrogen by Plants. A besarte of great interest has been entered into in the French Academy between the cele- brated agricultural chemist, M. Boussingault, and M. Ville, respecting the absorption of ni- trogen by plants, which has been conducted with unusual interest and some acrimony. The question discussed by these gentlemen was this: May we ascertain whether or not vege- tables possess the faculty of directly absorbing to their advantage a portion of this gaseous azote which forms the greatest part of the atmosphere? The importance of the question is evident: if the free and gaseous azote may directly enter into vegetable organisms without passing through some intermediate combination, the veritable source of agricultural wealth is in the atmosphere; if, on the contrary, before the azote commingles with the plant, it must unite itself to some other element, the agricultural chemist must turn his attention to the search of some new and better method of favoring the slow and difficult formation of combi- nations of azote. In hoth of the hypotheses the importance of manure remains incontestable, but their functions will not be so important. If azote gas is not capable of assimilation, if it is simply destined to temper the action of the oxygen with which it is mixed in the air, it is evident how important organic matters are in manures, bringing as they do the elements of the azotic principles elaborated by the plants. If, on the contrary, the azote of air ig ab- sorbed during the act of vegetation, if it becomes in this way an integral part of the Yege- table, then the mineral substances of manures contain the greatest part of their fertilizing pro- perties; for the azote element would have been abundantly furnished by the atmospheric air. Why, then, has the chemist not yet determined this important point, whether gaseous azote is or is not directly assimilated by plants. The great obstacle lies in the difficulties of making the experiment, which should resolve the question. When the chemist would place a plant under a definitive regimen, to ascertain what it obtains from the mineral kingdom, whence it extracts a portion of its aliment, it is indispensable to measure, to weigh, to analyze every thing—the air it respires, the water which moistens it, the soil which upholds. M. Boussin- gault “and M. Ville use different methods, of which they are tenacious. It cannot be denied that M. Boussingault exhibits a great deal of art in the process he used in his experiments. He first abandoned the ridiculous pretension—commonly entertained before him—of measur- ing by default the azote a plant would have absorbed while it lived during a certain time in a limited quantity of air. He substituted in its stead, raising the plants in a completely sterile soil, and comparing the composition of the seed and the composition of the small crops so ob- tained at the expense of air and water alone. A handful of earth previously calcined, and watered with distilled water, evidently can furnish no organic matter to the plant which is developed there; and consequently, if, after the crop is gathered, the chemical analysis shows it contains more azote than the grains sown contained, it is manifest that this azote came by the air: this result M. Boussingault obtained. by. experimenting with the seed of clover and of peas. But in communicating this result to the world, M. Boussingault did not pretend to do more than to exhibit the bare fact. He made no deduction to demonstrate that it came by the air in its normal state, or by the rare ammoniacal vapors from which the atmosphere is never ex- empt. M. Ville did not imitate his silence. He studied the question, and found the azote of the crops was ten, twenty, thirty times greater than the azote of the seed. However, M. Boussingault, pursuing his researches, (using a different method, ) attained diametrically op- posite results, or results which are completely negative. To avoid any objection which might be urged on the ground of the permanent communication of the apparatus with the pxternal air, he planted the objects of his experiments in a completely closed vase, and furnished them in the beginning with the quantity of carbonic acid and of water necessary to their alimenta- AGRICULTURAL CHEMISTRY AND GEOLOGY. 167 tion during the whole course of their deyelopment. The apparatus was thus made extremely simple, being nothing but a large glass globe, capable of holding some sixty or eighty quarts; he placed in the bottom of the globe (after having made it sufficiently humid) a certain quan- tity of pumice-stone, pounded, which had been washed, heated red hot, and, after it had cooled, mixed with the ashes of barn-yard manure and of seed similar to those about to be planted. The opening of the globe was immediately covered with a cork, which was itself covered with a caoutchouc cap. Forty-eight hours after this had been done the cork was again removed, and enough pure water added to bathe the base of the pumice-stone, which had been disposed ina heap. Then the seeds were planted—they being inserted in a glass tube, which guided them to the place where they should lie. After the seeds were introduced, the tube was again closed, and, when the seed had germinated sufficiently, the confined atmo- sphere was charged with carbonic acid gas, by substituting in the place of the cork a second globe superposed on the first, having about one-tenth of the capacity of the first, and con- taining the acid gas prepared beforehand; the juncture between them was then filled with sealing-wax, and half of the apparatus was buried in the ground. The experiment was now abandoned to itself, and the experimenter hadudittle more to do besides to observe the plants’ progress, to take advantage of the opportune moment to transfer them to his laboratory. The result of M. Boussingault’s experiments is, that there is no azote fixed in an appreciable quan- tity during the course of the vegetation: the azote of the seed passed into the plant, the azote of the air remained fixed in the air. M. Ville urges that a positive result is of more import- ance than a mere negative result; that he has, to sustain his position, the gramme of azote which he discovered in the plants he reared on a perfectly sterile soil; besides that, during his experiments, he ascertained the circumstances in which M. Boussingault placed his plants are peculiarly unfavorable to the health of the plant, and to the exercise of the function of assimilating: they pervert the function whose office they both are studying. This discussion, although no positive results were attained, will nevertheless be read with interest. The following is an abstract of a communication previously presented to the French Acade- my by M. Ville, on the absorption of nitrogen :— After stating that it has often been asked if air, and especially nitrogen, contributes to the nutrition of plants, and, as regards the latter, that this question has always been answered negatively, the author remarks that it is, however, known that plants do not draw all their nitrogen from the sojj, the crops produced-every year in manured land giving a greater pro- portion of nitrogen than is contained in the soil itself. The question which he has proposed to himself for solution is, Whence, then, comes the excess of nitrogen which the crops con- tain, and, in a more general manner, the nitrogen of plants, which the soil has not furnished? He divides his inquiry into the three following parts :— First. Inquiry into and determination of the proportion of the ammonia contained in the air of the atmosphere. Second. Is the nitrogen of the air absorbed by plants? Third. Influence on vegetation of ammonia added to the air. 1. The author remarks, that since the observation of M. Theodore de Saussure, that the air is mixed with ammoniacal vapors, three attempts have been made to determine the proportion of ammonia in the air; a million of kilogrammes of the air, according to M. Griyer, contain 0-333 kil. ammonia; according to Mr. Kemp, 3-880 kil. ; according to M. Frésenius, of the air of the day, 0-098 kil.; and of night air, 0-169 kil. He states that he has shown the cause of these discrepancies, and proved that the quantity of ammonia contained in the air is 22-417 grms. for a million of kilogrammes of the air, and that the quantity oscillates between 17-14 grms. and 29-43 germs. 2. The author states that, though the nitrogen of the air is absorbed by plants, the ammonia of the air contributes nothing to this absorption. Not that ammonia is not an auxiliary of vegetation, but the air contains scarcely 0-0000000224, and in this proportion its effects are inappreciable. These conclusions are founded upon a great number of experiments in which the plants lived at the expense of the air, without deriving any thing from the soil. For the present, he confines himself to laying down these two conclusions: 1. The nitrogen of the air 168 THE YEAR-BOOK OF AGRICULTURE, is absorbed by plants, by the cereals, as by all others. 2. The ammonia of the atmosphere performs no appreciable part in the life of plants when vegetation takes place in a limited at- mosphere. After describing the apparatus by means of which he carried on his experiments on the vegetation of plants placed in a soil deprived of organic matter, and the manner in which the experiments were conducted, he adduces the results of these experiments in proof of the above conclusions. 8. With reference to the influence of ammonia on vegetation, the author states that, if am- monia be added to the air, vegetation becomes remarkably active. In the proportion of four ten-thousandths, the influence of this gas shows itself at the end of eight or ten days, and from this time it manifests itself with continually increasing intensity. The leaves, which at first were of a pale-green, assume a deeper and deeper tint, and for a time become almost black; their petals are long and upright, and their surface wide and shining. In short, when vegetation has arrived at its proper period, the crop is found far beyond that of the same plants growing in pure air, and, weight for weight, they contain twice as much nitrogen. Be- sides these general effects, there are others which are more variable, which depend upon par- ticular conditions, but which are equally worthy of interest. In fact, by means of ammonia we can not only stimulate vegetation, but, further, we can modify its course, delay the action of certain functions, or enlarge the development and the modification of certain organs. The author farther remarks, that, if its use be ill directed, it may cause accidents. Those which have occurred in the course of his experiments appear to him to throw an unexpected light upon the mechanism of the nutrition of plants. They have at least taught him at the expense of what care ammonia may become an auxiliary of vegetation. These experiments, which were made under the same conditions as those upon the absorption of nitrogen, are then de- scribed, and their numerical results given. To the conclusions already stated, the author adds that there are periods to be selected for the employment of ammonia during which this gas produces different effects. If we com- mence its use when several months intervene before the flowering season of the plants, it pro- duces no disturbance; they follow the ordinary course of vegetation. If its use be commenced at the time of flowering, this function is stopped or delayed. The plant covers itself with leaves; and if the flowering takes place, all the flowers are barren. Chemical Investigation of the Phenomena of Vegetation. Tux following are the details of experiments recently presented to the French Academy by M. Boussingault, on the phenomena of vegetation, the researches described being mainly undertaken for the purpose of settling the question, whether plants obtain their supplies of nitrogen from the atmosphere directly, by absorption: — On the 17th of May, 1854, the author sowed three seeds of the garden-cress (Cresson alénoisa) in a flower-pot containing three kilogrammes of earth; and at the same time three similar seeds were placed in the same quantity of earth, enclosed in a glass vessel capable of containing 68 litres, which was then closed so as to exclude all air. On the 16th of June, the plants in the closed space were twice as large as those in the flower-pot, which had remained in the open air. On the 15th of August, the plants were collected: the enclosed plants had flowered normally, and bore the usual quantity of ripe fruit. In the second series of experiments, the seeds were placed in a soil which had previously been calcined. To this the ashes of various plants were added. The plants vegetated in an air-tight case of plate glass, capable of containing about 104 litres. Air was then constantly drawn in by an aspirator, after passing over pumice-stone moistened with sulphuric acid. By a simple arrangement of the apparatus, carbonic acid was allowed to enter the receiver in such quantity, that the air carried with it from 2 to 8 per cent. of this gas. The pumice- stone in which the seeds were placed was contained in pots containing 4 decilitres; the pots. being previously heated to redness. The ashes were prepared with particular care, in order that no carbon should be mixed with them. The carbon, which is of no consequence in itself, would possess an influence if nitrogenous bodies were contained in the ashes. The amount AGRICULTURAL CHEMISTRY AND GEOLOGY. 169 of nitrogen in the ashes was carefully determined: they contain cyanides. The author found in one gramme of the ashes of Meadow hay... Ears of corn... POS, sssassiscoeen » dL 6 ay g Oats (grain). sie CO ce £6 Couch-grass......scssercccscesen seccescsseresessrssecssssssosssees OD a vf soavee soos 5 milligrammes of nitrogen. veer 58 as The mixed ashes mentioned in the following experiments were those obtained by the com- bustion of the stems and leaves of beans and lupines: 1 grm. of these ashes contained 0-1 milligrm. of nitrogen. Besides this, the washed ashes of stable manure were frequently added. The seeds of beans and lupines employed in the experiment contained the following quantities of nitrogen: dwarf beans, 4-475; lupines, 5-820 per cent. The experiment lasted two months and a week. A seed weighing 0-337 grms., and consequently containing the amount of nitrogen stated below, was sown on May 12, 1854. The soil consisted of pumice- stone, to which 0-05 grm. of mixed ashes were added. On July 19th, thegflant had eleven leaves, and the cotyledons were withered. In this experiment, 37,00 res of air were passed through the apparatus in which the plant was enclosed. The result of the first experiment was as follows: In this, as in all the other experiments, A represents the amount of nitrogen found in the plant and in the soil at the conclusion of the experiment, and B the nitrogen contained in the seed from which the plant was raised. In this case no nitrogen was taken up by the plant:— Ae siren ane ravetinrs suvreivemiene gatesiaeaes « 0°0187 grm. B=... aseeweecassdesoaseres sevatoedececcevesesserees O'0196 * Tas) of auleowen during most ar sesreseenee 0°0009 Vegetation of a Bean in two months and ten days—The re weighed 0:720 grm. It was sown May 14, 1854: 0-01 grm. of mixed, and 5 grms. of washed ashes, were added to the soil. On June 22d, the plant had six normal dark-green leayes. The seed-lobes were strong and very fleshy; they had withered on July 2d. The plant began to bloom on July 20th, when these leaves had fallen from the stem. On July 25th the plant bore four open flowers, twelve fully-developed leaves, of a pale-green color, and three young dark-green leaves: the stem was 28 centims. in height. The plant, dried on the water-bath, weighed 2 grms. During its growth, 41,500 litres of air had passed through the apparatus. No nitrogen was absorbed. Kes iiiravige saiemutines stujbucslsceeaionrseavasaseatcisacs: 00890 pris Bi vescasissesececsncvesevaceuinsy 0-0322 « Gain in nitrogen —.... 00003“ Two Beans vegetated for three months and a week.—The two seeds weighed 1-510 grm. They were sown on May 12th. The soil had added to it 0:3 of mixed, and 8 grms. of washed ashes. On July 17th, the plants had twenty-six leaves and thirteen flowers. On the 25th, there were four small, dark-green pods, and the leaves were very pale. On the 10th of August, two of the pods were fully developed; they contained three well-formed seeds, nearly as large as those from which the plants were grown; they weighed 7 centigrms. The dried plants weighed 5-15 grms. During the experiment, 55,500 litres of air passed through the appa- ratus. Result:— ‘ 0°0666 grm. 00676 “ TSG 88 assesiisna sav cvausviedasaeipicedad ccdesshevevesyeaviiguosess O-0010,. “#2 In this case, also, there was no absorption of nitrogen. In the following experiments, all the preceding arrangements, as regards the soil, the addition of ashes and water, were retained; but the pots in which the plants were grown were placed so that the wind could not move their leaves, while the plants were sheltered from rain by a glass apparatus, They stood upon a balcony, 10 metres from the ground. A Bean vegetated for three and a half months in the open air.—The seed, which weighed 0.78 170 THE YEAR-BOOK OF AGRICULTURE. grms., was sown on June 27th. Manure ashes were added to the soil. On October 12th, the plant bore one pod, containing a single imperfect seed. Result :— APS Bes aR cactineiontes anaieas saasese 0°0380 grm, Be nesenecectsconeceerens sesees i vacseneavereoes 0°0349 Gal cssvestasstseavssacodsasossussen sosesnbea cesses 00031 Vegetation of Oats three months and a half in the open wir.—The stalk bore grains. Four grains of oats, weighing 0-151 grm., were sown on May 20, 1852. Manure ashes were added to the soil. On September Ist, the plants had from six to nine leaves, and each of them a lateral shoot. The straws were very straight, and each bore 2 ripe, well-formed, but very small seed. The five seeds together weighed two centigrms. The dry plants weighed 0-67 grm. Result:— AJ (gcsitueiasdsaeen tgassoisiSoaseusss sisessauniidssdalasinesieassbansaceses wo» 0:0051 grm. Bisa daieuven vee 00041 © GAIN = weereccsesseee seeteesenens itis slavesvcevbaceus abeshens « 00010 Vegetation of ptoars Bean in two and a half months.—The plant was watered with water saturated with carbonic acid. The seed weighed 0-655 grm.; sown May 17, 1853; manure ashes added to the soil. On July 9th the plant had seven expanded flowers. On August 20th the flowers had produced no fruit. The stalk was 33 centims. in height, and bore 15 leaves: the cotyledons and seed-lobes had withered, but stilladhered. The plant was strong, and weighed 2-72 grms. Result:— Ti089 Se prance coverv ee gas oldvnbuan scaaiapensuconasesaessrcasnassieats 0-0023 se Vegetation of two Lupines. in two months.—The two seeds weighed 0-630 prm.: they were planted June 80, 1854. 2 grms. of washed ashes were added to the soil. On September 5th, each lupine bore eight leaves: the cotyledons were withered: the plants 11 centims. high :— A=... seyece easeeanenats Sésisasespecvsisaiens 0°0387 prm, Bae nine sevcvecesacereesseres 0367 « Gain — wiecsgessscscsssscsessessseessesesseensessavess conser senses O°0020 Vegetation of Cress in two months.—Seeds were produced. The seed weighed 0-50 grm., and was sown on July 15, 1854. The soil had an addition of 0-1 grm. of mixed, and 1 grm. of washed ashes. -The water given to it was saturated with carbonic acid. The seed-leaves were evolved on July 24th, and normal leaves appeared on the 30th. On August 6th, the seed-leaves were withered: they were taken off and preserved. The plants began to flower on August 18th. The leaves were very small. The flowering went on from the 18th to the 28th of August: the flower-leaves became dry in. proportion as the upper ones flourished. On September 15th, each stalk bore a very small seed, although the fruit differed but little in size from that of garden-cress :— De cevisvensisiasaesvacsices sacasvvssencisscrviadsevicorvecvestaaneareess, 0027S 5 Bie scstsaees vee 070259 Gait sams VOUS & These last results of the vegetation of plants in the open air show that the quantity of nitrogen which may be absorbed from the atmosphere by plants is not greater than may be accounted for by errors of determination. It certainly appears that a little nitrogen was taken up. In his memoir, the author further refers to the question, whether this nitrogen is derived from the minute organic bodies which float in the air,.or from carbonate of ammonia. He observed the formation of green spots, produced by minute green ecryp- togamia, on the outside of the flower-pots, which were never seen on those excluded from the air. He also saw those green filaments produced in rain water, which had been collected at the beginning of a shower, and kept ina flask. Bineau has observed that these filaments consume all the ammonia of rain water. The author concludes with some observations on the part played in vegetation by the nitrogenous body pre-existing in the seed, or that formed by the aid of the manure. He describes the vegetation of a plant from seeds which weighed only 5), milligrm., and which must therefore have contained a scarcely ponderable quantity AGRICULTURAL CHEMISTRY AND GEOLOGY. 171 of nitrogen, and finds in the vegetation of this plant a convincing proof that the gaseous nitrogen of the atmosphere is not assimilated by plants. — Comptes Rendus, Oct. 2, 1854, p. 601. On the Agricultural Value of Gypsum. BY SAMUEL W. JOHNSON. Iz is nearly one hundred years since gypsum (plaster of Paris, sulphate of lime) began to acquire its agricultural significance. Since that time it has become celebrated on account of the successes that have attended its use; while the ill results, and want of results, that have followed its application, have not failed to make it many enemies. Franklin, in the United States, and Schubert Von Kleefeld,* in Germany, towards the close of the last century, simultaneously gave a great impulse to the use of gypsum. Within the last seventy years, an immense number of observations and experiments have been made with it; and yet to this day the method and condition of its action are very imperfectly understood. Before we attempt to learn that which is now unknown, we must first of all carefully ex- amine our existing stores of knowledge; we must have in mind all that has been done and learned relating to the subject: we thus acquire points of departure, discover the trails which may guide us through the maze, and save ourselves the trouble of repeating what has been already either well or vainly done. What is gypsum? When pure and unburned, 100 pounds contain— Lime.......0008 Sulphuric a Waterss... . 323 pounds. - 46h = « 21 a 100 The water is in chemical combination with the sulphate of lime. By heating the com- pound, the 21 per cent. of water is driven off; and what remains, called burned or boiled plaster, consists in 100 parts of— TAG cirestntesentenrecs: wanexevereneniveva nanmexemexe onesuxesscoas £1 parts, Sulphuric BCI. esse rereerereserseersrsectereneteseencoeess settesseeess 5D nk 100 The agricultural effect of burned and unburned plaster, so far as we know, is precisely alike; for when the former is exposed to dews or rains, it immediately recovers its water, unless it has been too strongly heated, in which case it attracts water slowly or not at all. This at- traction of water is in itself no advantage, for the water attracted combines chemically with the plaster, and can never be of avail to the plant any more than the water already contained in unburned gypsum. When the plaster has thus satisfied its chemical thirst for water, it has no more absorbent power for that substance than so much ordinary soil; and hence the notion that plaster helps vegetation to water, and is thus of agricultural value, is not sup- ported-by a particle of evidence. The advantages of burned plaster are, that it is more easily reduced to a fine powder, which facilitates its solution in water and its distribution through- out the soil. Besides, by its use the transportation of 21 per cent. of water is saved. On the other hand, unburned plaster is cheaper by so much as the burning costs; and burned plas- ter, if too strongly heated, may become a little less readily soluble in water. This latter con- sideration is not probably of much weight, so that it is reasonable to suppose that on the soil 79 pounds of plaster = 100 pounds of unburned plaster. Actual experiments have failed to establish any superiority in the agricultural effect of one form over the other, in case both were equally pulverized. The above statements refer to pure sulphate of lime; but plaster, as quarried for agricul- tural purposes, often contains several per cent. of admixture, as clay, carbonate of lime, &c. These are of little consequence unless their quantity be quite considerable. The presence of quick-lime in calcined may perhaps account for the ill success of some in fixing ammonia * Schubert of Clover-field, so knighted by Joseph I., on account of his merit in extending the cultivation of clover. 172 THE YEAR-BOOK OF AGRICULTURE. with help of gypsum; for, as is well known, caustic lime expels ammonia from all substances that contain it. What crops are benefited by plaster ?—It were not difficult to find authentic cases of plaster having proved useful on almost every field crop, and there is no lack of instances in which it has failed on every one. But the loose way in which the statements of farmers are often given to the public makes many of them of little or no value. It is well-recognised fact that circumstances alter cases; when we know the circumstances, we can understand the difference in the cases. Usually, in the records of experience and experiment which we find in the papers, so few circumstances are taken into the account that we are actually no better enlightened at the end of the story than before; there is no making out the case. This is especially true of the statements with regard to plaster; and hence we find contradiction upon contradiction, and contradiction contradicted. It is not that statements do not contain the truth; they may contain nothing but the truth, but they rarely include the whole truth. This is not at present to be entirely helped, but there is vast room for improvement. In attempt- ing, therefore, to give a summary of the results of practice in the use of gypsum, it is only possible to assume as facts those statements which have been confirmed by the according voices of many observers. It is the result of all experience that plaster is especially advantageous to the cultivated leguminous plants—viz. clover, lucerne, esparsette, vetches, peas, and beans. Its effects upon clover in particular have been remarkable. European writers assert that to gypsum is largely due the introduction of clover into agriculture, and the many improvements that have followed its cultivation. On other crops it seems to be beneficial only by way of exception, and yet the exceptions are numerous and often striking. After the above-specified plants, tobacco, cabbage, rape, hemp, flax, and buckwheat are mentioned by Girardin as benefited by plaster. All writers agree that grain crops are rarely influenced by it. In the Unjted States, gypsum has been reported useful on almost all crops. It is a favorite application to meadows. Professor Norton used to mention the case of meadows near Springfield, Massa- chusetts, on which the mere application of a few bushels of gypsum (two to three bushels, if I remember rightly) per acre ensured a good yield of grass, where otherwise the growth was very inferior. It is also very common to apply a handful of plaster to each hill of corn and potatoes at the time of planting, or when the plants are some inches high ; how often profit- ably, we have no means of knowing. It has indeed been found useful on wheat. There is obviously need of new trials on every kind of crop. We reasonably hope one day to learn under what circumstances plaster can be useful, even to those crops for which it is not usually recommended. Undoubtedly, those conditions which cause the occasional failure of plaster to benefit the leguminous plants, are closely related to those which make it more génerally unreliable when applied to other crops; and the conditions that make it generally useful to the former, make it sometimes valuable for the latter. What part of the plant is most developed by plaster ?—With regard to this question, expe- rience answers that the increased development of a plant consequent on the use of gypsum is disproportionately great in the stem and foliage: the production of seed is not greatly in- creased. This observation stands naturally connected with the fact that plaster is most effi- cacious on those plants used for fodder which yield a large mass of vegetation, and least valu- able on the grains which are cultivated mostly for their seed. Tobacco and maize, which have much foliage and stem, potatoes, which develope much foliage under cultivation, and produce fleshy tubers and little seed, are further examples. A few experiments are on record in which plaster applied to peas produced a decided increase of straw, but hardly affected the amount of seed. Stockhardt, however, says that the seed-production is usually increased, though not proportionately to the straw. The effect of gypsum on the quality of the plant.—Whether crops, which.have attained a larger growth in consequence of the use of gypsum, contain a larger proportion of sulphuric acid and lime than similar crops produced by the same without plaster, is not yet fully ascer- tained, since experiments made to determine this point have not agreed in their results. New investigations would easily settle this matter—one very important for the theory of the action of plaster. AGRICULTURAL CHEMISTRY AND GEOLOGY. 178 It is well known that peas often refuse to cook soft, even after hours of boiling. The reason of this is not at all understood. It has been asserted that manuring the crop with plaster gives the peas this quality; but the contrary is also asserted. This is a point to be studied. Influence of the soil on the action of plaster.—The character of the soil must necessarily greatly affect the operation of this fertilizer. A soil already rich in sulphate of lime of course cannot be greatly benefited by addition of more. A poor, light, or exhausted soil, deficient in mineral plant-food, as phosphoric acid, potash, &c., cannot be expected to become fertile by treatment with plaster; for this substance cannot supply those matters which are want- ing, and without which no plant can flourish. Cold, wet, heavy, and impenetrable soils are usually almost unaffected by plaster; sometimes, its use has been apparently disadvantageous on them. Porous soils, either sandy or loamy, which readily dry after rains, and which are well dunged, experience the most benefit from plastering. Excess of moisture and poverty of the soil are the chief hinderances to the action of gypsum. On lime and chalk soils it is no less effectual than on others. In general, it may be stated that unless the other conditions of good culture be observed and provided for, the farmer who uses gypsum will “lose his money and his trouble.” It is undoubtedly a fact, that the circumstances which insure the best effect from gypsum are nearly identical with those which are otherwise most favorable to vegetable growth. Liffect of climate and weather.—Countries, like South England, the greater part of France, Bohemia, &c., where, on account of the vicinity of the sea, or the existence of forest and hill ranges, the climate is uniform; and where, during the growing season, the rain-falls are fre- quent, but moderate; where, in other words, it is neither too wet nor too dry,—there gypsum stands in greatest favor. It is doubtless the fact that the frequent wetting of the soil assists the action of plaster by bringing it into solution; yet the weather probably exerts more influ- ence on the plant itself directly than on the action of the plaster with which it is manured. Climate modifies the conditions of vegetable growth to a wonderful degree. In the more northern part of our temperate zone, a stiff clay soil is very intractable and unproductive ; while in Egypt, where it never rains, a similar soil yields the most profitable returns. We should, therefore, expect to hear from a Canadian farmer that plaster has little good effect on clay soils; while in the warmer South, they might be benefited most of all. Quantity and time of application.—In England and Germany, it has been found that 250 to 400 pounds per acre is the best quantity to apply. The advantage of larger applications is usudlly very inconsiderable. Gypsum is usually applied in the spring, and in case of clover, &c., when the vegetation is 3 to 4 inches high. In the United States, it is applied to corn and potatoes in the hill at planting, but more frequently when they have attained the above- mentioned height. Many farmers are of opinion that plaster acts best when it remains adhering to the leaves for some time. Accordingly, it is highly recommended to sow plaster just before or after a gentle rain, or when the dew is on the plants. Warm, moist weather insures the full action of plaster. If the weather be cold at the time of sowing, its effect is stated to be very insig- nificant. This is, however, doubtful. In Germany, the first of May is generally considered the best season for plastering; and experiments made in Saxony, especially to ascertain the most favorable time, have confirmed the opinion. Not a few, however, deem it indifferent whether the plaster adhere to the plant or fall directly upon the soil. Dombasle employed the following method: He plastered his meadows at the time of seed- ing, and repeated the dose in the following spring. Clover treated in this way grew very luxuriantly, sometimes even to the detriment of the grain with which it was sown. It is re- ported that clover thus plastered is less injured by frosts, and is ready to cut a week or two earlier than when gypsum is not applied. Duration of effect.—According to Girardin, ‘‘experience has established that plastering (of clover?) should not be repeated oftener than once in five or six years, if any action is to be expected from it.” Other writers agree in admitting that its benefit continues nearly or quite aslong. Its effect: has often been observed to be greater the second than the first year after application, and is often unabated the third season. The duration of its action is doubtless 174 THE YEAR-BOOK OF AGRICULTURE. : somewhat dependent on the quantpty applied, and must be materially influenced by the weather in the second, third, and following seasons, as well as in the first. Ihave thus given a condensed statement of the results and opinions of practical men rela- tive to the use of plaster. The conclusion adopted are those which are sustained by the ma- jority of facts. It is apparent what uncertainty prevails in our knowledge of this subject. It remains, by means of new and more careful observations and by more rigid experiments, to determine the actual value of these statements, and to acquire additional information. Hundreds of single results that have been published are of no value whatever in deducing general rules, because the vagueness of many agricultural terms makes it impossible to know what degree of truth a statement possesses. A soil is a very complex thing, and may include many conditions which effect the action of a fertilizer; yet in a report of a trial of plaster we find nothing written of the soil except the prefix clayey, or sandy, or loamy. The important characteristics upon which the whole result of the experiment hinges may never be recognised nor mentioned; and hence, while the fact is true that the crop was benefited or not, we have no logical ground to assume that any of the mentioned causes or circumstances had any thing to do with the effect, more than a number of other unnoticed causes which must have been present and operative. Admitting that much remains to be learned, still it is evident that for practical purposes so much may be accepted—viz. : 1. Leguminous plants are especially benefited by plaster, while— 2. All other plants of large foliage, whose agricultural value does not consist in the produc- tion of seed, are usually aided by it in growth, upon— 8. Soils not already containing sulphate of lime, but— 4, In which all other parts of mineral plant-food are present in available form, and in suffi- cient quantity; which are, in practical language, well dunged, if not rich without manure; and which, further, 5. Present no physical obstacles to vegetable growth—which are dry, sufficiently porous, and well tilled, when— 6. The climate and weather are favorable to vegetation, when the temperature is mild, and rains are frequent but moderate. Does plaster exhaust the soil.—This frequently-asked question is easily answered, and by the word no. A soil is never exhausted by what is added to it, but always by what is re- moved, But a little explanation is needed, for although plaster cannot exhaust the soil, plastering is usually followed by exhaustion; and for the simple reason, that by its use nothing but sulphate of lime (ammonia indirectly?) is added, while phosphoric acid, potash, silica, &c. are removed. A purse soon gets empty if eagles are constantly taken out, though cents be now and then put in. The crops which plaster enables the farmer to remove from the soil exhausts it. Suppose that a few bushels of plaster raise the yield of clover upon a field ten per cent.; then, ten per cent. more of phosphoric acid, potash, &c. pass from the soil into the crop than would have passed had no plaster been used. If plaster only be added, then the field will be exhausted in one-tenth less time than if nothing at all had been applied. In both cases, the total amount of vegetation produced until exhaustion supervenes will be the same, and the amount of exhaustion the same. -In the one instance, the final result might be reached in ten years; in the other, in nine years. The difference is merely one of time. If benefit is to be derived from the use of plaster, it must be accompanied with other manure, or its action, however good at first, will ultimately cease. Manuring a poor soil with nothing but plaster is attempting to sustain vegetation on plaster alone; and this, like feeding chil- dren on little else than arrow-root, is a stupendous folly. It is trying to build brick houses without brick. Plants cannot be made of sulphate of lime any more than men can be made out of starch. ‘Out of nothing, nothing comes.” The healthy plant is the result of the co-ope- ration of many causes—the coincidence of many conditions. One cause, one condition can only act favorably when all the others but this are present. There is, there can be, no agricultural panacea. AGRICULTURAL CHEMISTRY AND GEOLOGY. 175 New Method of Determining Nitrogen. Dr. Simpson, of Dublin, has presented to the Chemical Society a communication re- specting a new process for estimating nitrogen. There are two modifications of his method. The first served for determining the comparative amount of nitrogen and carbonic acid formed during the combustion of an azotized organic substance. It did not differ widely from Liebig’s process now in use, except that oxide of mercury, diluted with oxide of cop- per, was employed for burning the substance, and chlorate of potash was placed at the end of the tube to yield a supply of oxygen. The absolute method resembled Dumas’s in prin- ciple; carbonate of manganese, however, being the substance employed for the production of carbonic acid, and some peculiar arrangements being introduced, especially in the receiver over the mercury trough. These processes had been worked out in Bunsen’s labora- tory; and were equally applicable to the determination of nitrogen in such substances as the vegeto-alkaloids, in nitrates, or in salts of ammonia. Phosphate of Lime—A New Test. Tur action of boracic acid upon the phosphate of lime, as described by OC. Tissier in the Comptes Rendus, (Paris,) is exceedingly interesting to agricultural chemists: If to an acid solution, either nitric or muriatic, containing phosphate of lime (or a soluble phosphate and chloride of lime) and an excess of boracic acid, there be added borate of soda in sufficient quantity to saturate the acid which holds the phosphate in solution, no borate of lime is precipitated, but all the phosphoric acid is thrown down in the form of phosphate of lime. This precipitate has not a variable composition, like that formed by being saturated with ammonia, but has a constant composition and a well-defined formula. It corresponds with that for which Berzelius gives the formula, 8 Ca. O, 3 P 0°, and which contains phosphoric acid, 49-09; lime, 50-91. This method of precipitating phosphoric acid from its solution will greatly facilitate the determination of the quantity of phosphates contained in soils and Manures. Value of Soil-Analyses. . Ar a late meeting of the Farmers’ Club in New York, Prof. Mapes adduced the follow- ing circumstances, as showing the value of soil-analyses:—At the meeting of the National Agricultural Society in Washington, Mr. G. W. Custis stated that he was owner of the Arlington Estate, containing some 5000 acres of land and several hundred negroes. For several years he had found it necessary, in order to pay his own expenses and those of his family, (including the negroes,) to mortgage the estate. He had an analysis made of his soil, with a view to ascertain fts deficiencies for a wheat crop, and, under proper instructions, he had those deficiencies supplied; and ‘ Now,’’ said he, “‘ gentlemen, I can say, instead of mortgaging my estate, I am continually lessening the mortgages I had previously obtained, and this year I have ten thousand bushels of wheat for the miller, while until the analysis was made I never was able to sell a single bushel of wheat above what was used for the hands.” Mr. John Jones, of Delaware, the largest wheat-grower within two hundred miles of Washington, said he bought a farm for $10 an acre, which he agreed to pay in small instalments and on a very long mortgage; the owner being glad to sell at that low price and on those easy terms. When he commenced operations, his first crop of wheat was some seven or eight bushels to the acre, on the plan of cultivation usual in the neighborhood. He sent his soil North to have it analyzed. On the basis of the analysis he planned his operations; and, “Gentlemen,” said he, “I raised a larger crop of wheat than any other man within the same distance of Washington. The assessors this year valued my land at $70 an acre, cal- culating from the value of the crop of wheat.” These cases had come under his (Prof. M.’s) supervision, and the preparation which he recommended, after analyzing the soils, was a mixture of guano with bones dissolved by sulphuric acid. They had added sulphate of ammonia, which had cost.them only as much as the carting of barn-yard manure had usually 176 THE YEAR-BOOK OF AGRICULTURE. cost. The soils of those gentlemen contained rather more potash than usual. But he had yet to find the first soil which is not capable of being benefited by the addition of the super- phosphate of lime. Phosphates in Turnips. Lizzie, in his recent work, appends the following note on the amount of phosphates found in turnips. The note occurs in connection with the following sentence, and has special reference to some experiments of Messrs. Lawes and Gilbert, of England, which are in oppo- sition to the views of Liebig:— “The small percentage of phosphates contained in the turnip is the reason why, in Ger- many and France, there is often obtained after grain a stubble crop of this root in the same year.” The note is as follows:— “Tf we calculate from the results of ash-analyses the quantities of phosphoric acid which are required respectively by a wheat crop, including grain and straw, and by a turnip crop, including roots and leaves, we find that wheat removes less of this substance from the soil than turnips. This result is apparently in contradiction to the fact so well established by - practical experience, that wheat requires more abundant supplies of phosphoric acid in the soil than the turnip. The two facts become reconciled when we take into account the longer time that the latter has in which to accumulate this mineral ingredient. ‘The turnip requires phosphoric acid to be supplied through the whole of its long period of growth, four or five months, but uniformly and always in small quantity only in a given time. Wheat needs the greater share of its phosphoric acid during the growth of the seed. This is the period in which, as practical men believe, the soil suffers the greatest—is most exhausted. If the wheat-plant finds a sufficient quantity of phosphoric acid within reach of its roots during the few weeks in which its seed is formed, then each kernel attains a full and normal development; if there be a slight deficiency of phosphoric acid, then the seeds are less numerous or less large; if the deficiency be very considerable, then nothing but straw is produced. ' «The quantity of phosphoric acid which a wheat soil should contain does not therefore stand in relation to the sum total which the plant needs, but to the quantity which the ker- nels require during the period of their development. ‘«When we compare the quantity of phosphoric acid which the soil must yield to a wheat crop during the month in which its seeds are forming, with that needed by a turnip-crop in any equal space of time, it is plain that wheat requires the presence of a far larger amount of this indispensable body in the soil than the turnip. This is a fact not to be aisteganied in manuring the soil for these crops. ‘‘The produce of a field stands related to the amount of that mineral ingredient which its soil contains in smallest quantity. “As a general rule, the manuring of a field should not be calculated from the sum total of mineral ingredients which the plant takes from the soil, but must be proportioned to that maximum of these substances which is required by the plant in a certain period of its growth.” In respect to the above, Mr. 8S. W. Johnson, of England, in a letter published in the Working Farmer, says:— «The above makes evident how necessary it is that not only the kind and quantity of substances removed by a plant from the soil be considered, but also the time and circum- stances in which the supply should be made. The latter are of equal moment with the former. Plants differ physiologically and structurally. These differences must be investi- gated, and taken into account. The chemist has hitherto too much neglected them. He has attempted in many cases to deduce the whole list of the plant’s chemical needs from its chemical analysis. Nothing could be more fallacious. He has found that an average crop of wheat and turnips contain nearly the same amount of phosphoric acid. He cannot, therefore, conclude that, so far as this ingredient is concerned, they will both flourish equally in the same soil.” 2 AGRICULTURAL CHEMISTRY AND GEOLOGY. 177 Messrs. Lawes and Gilbert deduced from their experiments that turnips. require more phosphoric acid in the soil than wheat, because that, on what they considered an exhausted soil, the addition of superphosphate of lime enabled them to raise turnips. Prof. Liebig, in his new work, has objected to this that the soil was not exhausted, as is proved by the fact that it yielded tolerable crops of wheat; and expresses his belief that the yield of turnips was not due to the supply of phosphoric acid, but to the solvent action exercised on the silicates of the soil by the free sulphuric acid of the agricultural superphosphate which was applied in large quantities. The considerations contained in the above note explain why wheat requires a soil richer in phosphoric acid than the turnip does. It is an interesting fact that a soil does exist which produces wheat, but refuses entirely to grow turnips, as the experimental soil of Messrs. Lawes and Gilbert. In the majority of cases we should expect the reverse. This shows the danger of too hasty generalization, and the importance of having a thorough knowledge of all the circumstances which act in any particular case. On the Amounts of Ammonia and Nitric Acid in Rain Water. Ar the British Association, Dr. Gilbert and Mr. Lawes communicated the results of their investigations on the amounts of ammonia and nitric acid in rain water. Their results during many months of the last two years were tabulated and compared with those of Boussingault; the great result being that rain water contains not quite one part of nitrogen to the million in the form of ammonia, and about five parts to the million in that of nitric acid. The ammonia is found in largest quantity in mists and dews, as might naturally be expected from its being evolved at the surface of the earth, and being absorbed by any moisture. In answer to questions put to him afterwards, Dr. Gilbert stated that the nitric acid was found most abundantly after storms, and varied very greatly at different periods of the year. The amount of ammonia which descended in a month’s rain was more constant. The doctor expressed his opinion, but with hesitation, that nitric acid and ammonia were about equally efficient in supplying nitrogen for plants; and therefore, as nitric acid is the more abundant in the atmo- sphere, he conceived that it afforded actually the larger quantity of azote to the vegetable world. Boussingault has recently published some additional researches on the above subject, from which it appears that the rain of the country contains less ammonia than that of the city, and that,the ammonia is more abundant at the beginning than at the end of a shower. He has also examined the dew, and always found it to contain ammonia. The proportions by several trials were six milligrammes to the litre; but the amount is reduced to 1-02 after a rainy day. On the 14th to the 16th of November, a thick mist prevailed so rich in"ammonia that the water had an alkaline reaction; a litre of the water contained about two decigrammes of carbonate of ammonia. Seventy-five rains, including the dew and mist examined, contained as a mean half a milligramme of ammonia. The great quantity of ammonia contained in the mist appears interesting in its bearing on vegetable pathology; in fact, although ammonia in small quantity is favorable to vegetation, « large proportion would be injurious, and would show its effects, especially on the leaves of flowers. Moreover, such a storm might have a deleterious influence upon respiration, and especially on the lungs of persons with pulmonary affections. New Theories in Agricultural Science. M. Bavprimont, professor of chemistry at the Faculty of Sciences at Bordeaux, has pub- lished a work ‘“‘On the Existence of Interstitial Currents in Arable Soil, and the influence which they exert on Agriculture,” in which, after a long study of the subject, he states that there is a natural process at work by which liquid currents rise to the surface from a certain depth in the ground, and thus bring up materials that help either to maintain its fertility or to modify its character. Many phenomena of agriculture and of vegetation have at different times been observed, which, hitherto inexplicable, are readily explained on this theory. Such, for example, the improvements which take place in fallows; and there is reason to believe that these currents materially influence the rotation of crops. 12 178 THE YEAR-BOOK OF AGRICULTURE. In Germany, Schleiden is attracting much attention by his masterly views on the phe nomena of vegetation; and it will surprise many to hear that he admits of no relation between the fertility of a soil and the quantity of fertilizing matters expended upon it. ‘‘The good- ness of the soil,” he says, ‘‘depends upon its inorganic constituents, so far, at least, as they are soluble in water, or through continued action of carbonic acid; and the more abundant and various these solutions, the more fruitful ig the ground.”? Arguing from this view, it is not richness of soil or humus that produces the multiplied varieties of Alpine plants in Ger- many, or the absence of it that produces but few. ‘Soluble mineral constituents’ are shown to be the characteristic of our cultivated field; and ‘‘an agricultural plant” is defined as one “distinguished from wild individuals of the same species by peculiar qualities which consti- tute its fitness for culture, and which depend upon a modification of chemical action.” The amazing yield of Indian corn in Mexico—from two hundred to six hundred-fold—is something which, with all our skill, we cannot accomplish, and is a fact in favor of the argument ‘that in no case do the organic substances contained in the ground perform any direct part of the nutrition of plants.’? The annual destruction of organic matter all over the earth is estimated at one hundred and forty-five billions of pounds, equal to two and one-fourth billions of cubic feet; and if all vegetation depends on organic matter for nutrition, to satisfy this consump- tion ‘‘there must have been, five thousand years back, ten feet deep of pure organic substance on its surface.’? Another illustration is furnished by taking the number of cattle and other animals in France in a given year, (1844,) and observing. the amount of food they consume. The process of nutrition would require 76,789,000,000 pounds of organic matter; six times more than the whole number contribute of organic matter towards reproduction, and in one hundred years ‘‘the whole organic material of the country would be consumed.”’ Again: look at a farm. How much more is carried off from it than is given back again! Generally the amount of its yield is three times greater than that of the organic matter it receives; while of the manure applied, the greater part is not taken up, but imperceptibly decomposed. Carbon is the most important of the constituents of plants: an acre of sugar plantation produces 7500 pounds of canes, of which 1200 pounds are carbon, and yet sugar plantations are rarely manured, and then only with the ashes of the burnt canes. With bananas the result is still more striking: the yield is 98,000 pounds of fruit in a year from a single acre, and of this 17,000 pounds—more than a fifth—is carbon; and the same acre will give the same return year after year for twenty or thirty years; and the ground at the end of that time will be richer than at the commencement, from nothing more than the decay of the large leaves of the plant. Here in Europe, too, the difference in weight and in carbon between the seed and the produce has often been noted: in wheat, 89 per cent; in red clover, 158 per cent.; and in peas, 361 per cent. These facts afford evidence of a supply of carbon derived from other sources than those commonly supposed to exist; and while we know that seeds will germinate and become vigorous plants in pure quartzose sand, or in cotton-wool, or on a board, we seem to have proof that the chief source of supply is the atmosphere. This is an interesting point, which further research will verify: Schleiden shows the process to be eminently simple. He says, in his work, of which a translation has been published by the: Horticultural Society—‘“ According to Link, Schwartz, and others, an acre of water-meadow contains 4400 pounds of hay, which, when dry, contains 45-8 per cent. of carbon. The hay then yields 2000 pounds of carbon, to which 1000 pounds may be added for the portion of the year in which the grass is not cut, and the roots. To produce these 8000 pounds of car- bon, 10,980 pounds of carbonic acid is requisite, which may be raised to 12,000 pounds, to compensate for the nightly expiration. Now, Schubler has shown that an acre of so wretched a grass as Poa annua exhales in 120 days (too low a computation) of active vegetation, 6,000,000 pounds of water. To supply the exigencies of the plants, therefore, it is only necessary for the meadow to imbibe 3} grains of carbonic acid with every pound of water. Mr. Lawes has found, also, that in a plant of any one of our ordinary crops, more than | 200 grains of water must pass through it for a single grain of solid substance to accumulate within it. He states the evaporation from an acre of wheat during the period of its growth to be 114,860 gallons, or 78,510,000 gallons per square mile. With clover, it is rather more; with peas and barley, less. When we apply these calculations to a county or a kingdom, we AGRICULTURAL CHEMISTRY AND GEOLOGY. 179 are lost in the magnitude of the processes by which nature works; but we see the more clearly that, on such a scale, the quantity of material supplied by the air, though minute to the individual, becomes vast in the aggregate. We see, moreover, the necessity for unde standing the relations between evaporation and rate of growth, and the laws and effects of absorption in soils. A thousand pounds of dry calcareous sand will gain two pounds in weight in twelve hours when the air is moist, while pure agricultural clay will gain thirty- seven pounds. The source of nitrogen comes next to be considered; and this also is seen to be independent of manures. Hereupon, itis observed that ‘our domestic plants'do not require a greater supply than in a state of nature. A water-meadow which has never received any dung, yields yearly from forty to fifty pounds of nitrogen, while the best plowed land yields only about thirty-one pounds. The plants for which most dung is used, as potatoes and turnips, are in fact proportionally the poorest in nitrogen.’? That there is a supply independent of the soil, is further seen in the millions of hides furnished every year by the cattle of the Pampas, without any diminution of produce; and in the great quantities of nitrogenous matters, hay, butter, and cheese, carried off from pasture-land; far more than is returned by the animals fed thereon. Experiments with various kinds of plants on various soils have satisfactorily demonstrated that increase of nitrogen in the land and in the crop does take place, quite irrespective of supplies of manure. With respect to ammonia, “it appears that one-thirteenth of a grain in every pound of water is sufficient for the exigencies of vegetation,:and there is perhaps no spring-water in the universe which contains so little.” Then as to sulphur and phosphorus, which are also among the constituents of plants, the quantity needed in proportion to the time of vegetation is so small, that 540,000th of a grain of sulphuretted hydrogen per cubic foot, diffused through the atmosphere to a height of 3000 feet, is all that is required. The consideration that cereals would soon disappear from the north of Europe, if not culti- vated, and perhaps from nearly the: whole of this quarter of the globe, adds weight to the arguments in favor of enlightened attention to the inorganic constituents of plants. The point is to bring the soil into harmony with the conditions by which growth may best be pro- moted. Much depends on the nature of the soil; the darkest-colored lands are generally the highest in temperature; hence the advantage of vegetable mould; while deep, light sands, and clay, which turns almost to stone in dry weather, weary and vex the cultivator by their unprofitableness. It is to be remembered, however, that soils which have the highest tem- perature of their own, may not be those most susceptible of receiving heat—that is, from the sun, because some lands are warmed by the springs that irrigate them. Here we have an explanation of the phenomena of certain soils which are warm in winter and cool in sum- mer. The application of humus evolves heat by the process of combustion; and sand, lime, clay, and humus are the combinations needed, the clay being in a proportion of from 40 to 50 per cent.; if less than 10 per cent., the land will be too light and poor. Although Schleiden’s views apply chiefly to the practice of German agriculturists, they will be found to bear on the whole science of cultivation. In summing up, he insists strongly on the necessity for selecting good seed; that from a barren soil, he observes, is likely to be more true to its kind than from well-manured land. Also, that the time of sowing should be adapted to the requirements of the plant; rye and barley, for instance, should be sown in drier weather than oats. And it will surprise many to read that he advocates a less frequent use of the plow. He holds plowing to be a “‘necessary evil, one to be employed only so far as necessity requires;’’ because, by the too frequent loosening of the soil, the decomposition of humus is so rapid as to overbalance the benefit. supposed to arise from exposure to the atmosphere. He shows, too, that covered fallows are in most cases preferable to naked fallows, as the latter tend to waste the valuable qualities of the soil; while, in a field sown with clover, the quantity of humus and carbonic acid is increased by the leaves preventing evaporation. Naked fallowing is to be adopted only when the soil cannot be loosened in any other way; but there is to be no stand-still; ‘‘the notion of rest, so prevalent among culti- vators, is clearly wrong, except it be rest from the destructive influence of the plow:” and always must it be borne in mind ‘that manures do not act immediately on vegetation by 180 THE YEAR-BOOK OF AGRICULTURE. means of their organic contents, but by reason of the inorganic substances which they involve.” Such is a brief outline of some of the views of one who holds a high position among men of science; and though in some particulars they may seem to be at variance with practice in this country, there is much in them worthy the attention of intelligent cultivators. It is remarkable how different branches of science help in advancing the question, and facts arise in support of the philosopher’s theories. By a recent inquiry into the amount and nature of the rain-fall at the observatory, Paris, it has been proved, that from the Ist of July, 1851, to the end of 1852, the quantity of azote combined therewith was—omitting fractions—22 kilogrammes per acre, being 12 kilogrammes in the form of azotic acid, and 10 kilogrammes of ammonia. The quantity of uncombined ammonia in the same time was 13 kilogrammes per acre; and of uncombined azotic acid, 46 kilogrammes. In the months when azotic acid was most abundant, there was least ammonia; the former always increases with stormy weather. Besides these elements, the quantity of chlorine present was equivalent to 18 kilo- grammes of marine salt, leaving out the insoluble matters held in suspension. In all this we seem to get a glimpse of the law of supply and demand in the great vegeta- tive operations of nature; and we see that those who advocate a more sparing employment of manures are not without good reason for their arguments. In the middle of Russia, corn is grown year after year on the same land, with no other fertilizer than the burnt straw; and in parts of Spain, wheat and barley succeed each other without any manure atall. And, without going so far for facts, we have them close at hand, in one of our midland coun- ties. A few years ago, the Rev. 8. Smith, in the neighborhood of Banbury, England, in- stituted a course of experiments on this very point, and with results which are singularly interesting. He took a field of four acres, having a gravelly soil, with clay, marl, and gravel as the subsoil. It had been hard worked for a hundred years; but except a thorough plow- ing, no other means were taken to improve it: not a particle of manure was supplied. Wheat was then sown in single grains, three inches apart, and in rows a foot apart, a space of three feet being left quite bare between each three rows, and this was con- tinued in alternate stripes all across the field. The sowing took place at the begining of autumn; and in November, when the planted rows began to show, all the intervening three-feet spaces were trenched by the spade, and six inches of the subsoil made to change places with the surface. ‘‘In the spring,”’ says the reverend agriculturist, ‘I well hoed and hand-weeded the rows of wheat, and stirred the intervals with a one-horse scarifier three or four times, up to the very period of flowering in June.” The crop looked thin and miserable until after April, when it:-began “to mat and tiller;” it did not turn yellow in May, and the stalk grew so stout and strong as to bear up well against the storms. When harvested, the result was highly gratifying, for the yield amounted to from thirty-six to forty bushels per acre, or rather per half-acre, seeing that as the alternate stripes were left bare, only one- half of the field was really planted. The quantity of seed used per half acre was a little more than a peck. Adjoining the field in which these experiments w were carried on was another which had four plowings, ten tons of manure, six or seven times as much seed, and yet it gave a quarter less to the acre. This might be looked on as an accident, were it not that Mr. Smith has repeated his experiment year after year, and always with greater success. He believes that if all the conditions be literally fulfilled, the same favorable result may invariably be obtained. No manure whatever is to be used; and in the second year, the stripe is to be sown which was left bare in the first; and so on, changing from one to the other, year after year. Here arises the question as to cost, and in contrasting the expense of plowing with that of spade-labor, he finds that he takes up only so much of the subsoil as the atmosphere will readily decompose in the year—four, five, or six inches, descending gradually to two spits. He employs six men at 2s. a day, and they dig an acre in five days, making an outlay of 60s. for the whole; but as only one-half is td be dug for the year’s crop, the time and cost are reduced by one-half, and thus brought down to the cheapest rate of plowing. The cost per acre, in the instance above mentioned, was £8 14s.; the return from the four quarters and two bushels of wheat and the straw, £11 14s., leaving a profit of £8. It should be under- AGRICULTURAL CHEMISTRY AND GEOLOGY. 181 stood that the cost includes rates, taxes, interest, scarifying, reaping—in short, all the opera- tions from digging to harvest. The parish in which Mr. Smith resides contains two hundred wheat-growing acres; he calculates that fifty laborers would have dug these in two months and eight days, so that, beginning the last week in September, all would be finished by the first week in December, leaving five months for the occurrence of casualties and their reparation before the crop has grown. His system, after the first plowing, it will be seen, is based entirely on spade- husbandry; he is of opinion, that it is applicable to thousands of acres “of hitherto imprac- ticable and unremunerating clay.” Schleiden and Smith agree in their faith in nature’s unassisted fertilizing powers, if not in their mode of clearing the way for the exercise of those powers. The system of the latter combines fallow without loss, for the yield is double; nature is left to drop the ammonia, and the time is given for its combination with mineral matters in the soil. The atmosphere con- tains all the organic elements of wheat, and if the ground be kept stirred, uncrusted, and loosened to a suitable depth, they will find their way in; and nitrogen even, as late experi- ments demonstrate, will be absorbed. As for inorganic constituents, Mr. Smith believes that they always exist in sufficient abundance, if sought for by frequent digging. Capillary Attraction of the Soil. From numerous observations which have been made at different times on the peculiar ap- pearance of the surface of soils, clays, &c., during the warm summer months, and the fact that they, when covered with boards, stones, or other materials, so as to prevent them from supporting vegetation, become, in a comparatively short time, much more productive than the adjacent uncovered soil, led to the belief that the soil possessed some power within itself, aside from the roots of plants, of elevating soluble materials from deep sources to the surface. ; To throw some light upon the subject, in May, 1852, I sunk three boxes into the soil— one, forty inches deep; another, twenty-eight inches deep; and a third, fourteen inches deep. All three of the boxes were sixteen inches square. I then placed in the bottom of each box three pounds of sulphate of magnesia. The soil to be placed in the boxes above the sul- phate of magnesia, was then thoroughly mixed, so as to be uniform throughout; the boxes were-then filled with it. This was done on the 25th of May, 1852. After the boxes were filled, a sample of soil was taken from each box, and the percentage of magnesia which it contained accurately determined. On the 28th of June, another sample of surface soil was taken from each box, and the percentage of magnesia carefully obtained as before. ‘The re- sult in each case pointed out clearly a-marked increase of magnesia. On the 17th of July, a sample of the surface soil was taken for a third time from each box, and carefully examined for the magnesia. Its percentage was found to be very perceptibly greater than on the 28th of the preceding month. On the 15th of the months of August and September following, similar examinations severally were made, ‘with the same evident gra- dual increase of the magnesia in the surface soil. The following are the results as obtained :— Box Box Box 40 inches | 28 inches | 16 inches high. high. high. Percentage of magnesia, May 25........ wee 0-18 0-18 0-18 es ” June 28.. 0-25 0°30 0°32 al s6 July 17.. 0-42 0°46 0°47 ae: “ Aug. 15.. 0°47 0°53 0°54 “ «Sept. 15., 0-51 | 058 | 0-61 Before the middle of October, when it was intended to make another observation, the fall rains and frosts had commenced; on this account the observations were discontinued. The elevation of the magnesia, as shown in the above experiments, depends upon capillary attrac- 182 THE YEAR-BOOK OF AGRICULTURE. tion, or the property which most liquids have to rise in tubes, or between plane and curved surfaces. ‘The minute interstices between the particles composing the soil are, to all intents and pur- poses, small tubes, and act as such in elevating moisture from below to the surface.. The particles held in solution by the water are likewise elevated with it, and are left, on the eva- poration of the water, distributed throughout the surface soil. This explains the reason why manures, when applied for a short or longer time upon the surface of soils, penetrate to so slight a depth: Every agriculturist is acquainted with the fact that the soil directly under his barn-yard, two feet below the surface, (that is, any soil of any ordinary fineness,) is quite as poor as that covered with boards or otherwise, two feet below the surface, in his meadow; the former-having been for years directly under a manure-heap, while the latter, perhaps, has never had barn-yard manure within many rods of it. The former has really been sending its soluble materials to the surface soil, the latter to the surface soil and the vegetation grown near, or upon it, if uncovered. The capillary attraction must vary very much in different soils; that is, some have the power of-elevating soluble materials to the surface from much deeper sources than others. The pores or interstices in the soil correspond to capillary tubes. The less the diameter of the pores or tubes, the higher the materials are elevated; hence, one very important con- sideration to the agriculturist, when he wishes nature to aid him in keeping his soil fertile, is to secure soil in a fine state of mechanical division and of a high retentive nature. Nothing is more common than to see certain soils retain their fertility with the annual addition of much less manure than certain others. In fact, a given quantity of manure on the former will seem to maintain their fertility for several years; while a similar addition to the latter quite loses its good effects in a single season. The former soils have invariably the rocks, minerals, &c. which compose them in a fine state of division; while the latter have their particles more or less sandy and coarse.—S. M. SarisBury, M.D., in Prairie Farmer. Benefit of Droughts. Tr may be a consolation to those who have felt the influence of long and protracted dry weather, to know that droughts are one of the natural causes to restore the constituents of. crops: and renovate cultivated soils. The diminution’ of the mineral matter of cultivated soils takes place from two causes: 1. The quantity of mineral matter carried off in crops, and not returned to the soil in manure. 2. The mineral matter carried off by rain water to the sea by means of fresh-water streams. These two causes, always in operation, and counteracted by nothing, would in time render the earth a barren waste, in which no verdure would quicken and no solitary plant take root. A rational system of agriculture would obliterate the first cause of sterility, by always restoring to the soil an equivalent for that which is taken off by the crops; but as this is not done in all cases, Providence has provided a way of its own to counteract the thriftless- ness of man, by instituting droughts at proper periods, to bring up from the deep parts of the earth food on which plants might feed when rains should again fall. The manner in which droughts exercise their beneficial influence is as follows:—During dry weather, a con- tinual evaporation of water takes place from the surface of the earth, which is not supplied by any from the clouds. The evaporation from the surface creates a vacuum, (so far as the water is concerned,) which is at once filled by the water rising up from the subsoil of the land; the water from the subsoil is replaced from the next below, and in this manner the circulation of water in the earth is the reverse to that which takes place«in wet weather. This progress to the surface of the water in the earth manifests itself strikingly in the dry- ing up of springs and of rivers and streams which are supported by springs. It is not, however, only the water which is brought to the surface of the earth, but also all that which the water holds in solution. These substances are salts of lime, and magnesia of potash and soda, and, indeed, whatever the subsoil or deep strata of the earth may contain. The water, ou reaching the surface of the soil, is evaporated, and leaves behind the mineral salts, which AGRICULTURAL CHEMISTRY AND GEOLOGY. 183 I will here enumerate—namely, lime, as air-slaked lime; magnesia, as air-slaked magnesia ; phosphate of lime, or bone-earth; sulphate of lime, or plaster of Paris; carbonate of potash and soda, with silicate of potash and soda, and also chloride of sodium or common salt,—all indispensable to the growth and preduction of plants which are used for food. Pure rain water, as it fails, would dissolve but a very small proportion of some of these substances; but when it becomes soaked into the earth, it there becomes strongly imbued with carbonic acid from the decomposition of vegetable matter in the soil, and thus acquires the property of readily dissolving minerals on which it before could have very little influence. I was first led to the consideration of the above subjects by finding, on the re-examination of a soil which I analyzed three or four years ago, a larger quantity of a particular mineral substance than I at first found, as none had been applied in the mean time. The thing was difficult of explication until I remembered the late long and protracted drought. I then also remembered that in Zacatecas and in several provinces in South America, soda was ob- tained from the bottom of ponds, which were dried in the dry, and again filled up in the rainy, season. As the above explanation depended on the principles of natural philosophy, Lat once instituted several experiments to prove its truth. Into a glass cylinder was placed a small quantity of chloride of barium in solution; this was then filled with a dry soil, and for a long time exposed to the direct rays of the sun on the surface. The soil on the surface of the cylinder was now treated with sulphuric acid, and gave a copious precipitate of sulphate of baryta. The experiment was varied by substituting chloride of lime, sulphate of soda, and car- bonate of potash; for the chloride of barium; and on the proper reagents being applied, in every instance the presence of those substances were detected in large quantities on the sur- face of the soil in the cylinder. Here, then, was proof positive and direct, by plain experi- ments in chemistry and natural philosophy, of the agency, the ultimate beneficial agency of droughts. ‘We see, therefore, in this, that even those things which we look upon as evils by Provi- dence, are blessings in disguise, and that we should not murmur even when dry seasons afflict us, for they, too, are for our good. The early and the later rain may produce at once abundant crops; but dry weather is also a heneficial dispensation of Providence, in bringing to the surface food for future crops, which otherwise would be forever useless. Seasonable weather is good for the present; but droughts renew the storehouses of plants if the soil, and furnish an abundant supply of nutriment for future crops.—Jamzes Hiaains, Mary- land State Chemist. New Method of Using and Dissolving Bones. Av a recent meeting of the Hillsborough Agricultural Society, at Manchester, New Hamp- shire, General Riddle being called upon by the president to relate his experience in the use of guano and other special manures, made some statements in regard to the way of dis- solving and using bones, of which the following is a condensed summary :— General Riddle took sixty gallons of ley from oyster-shell lime to two hundred pounds of bones, and boiled them together a few hours, and the bones were all dissolved or reduced to a powder. A bushel of lime, he says, will make six gallons of ley; and further, that bones dissolved or reduced in this ley make a dry powder, which may be applied like ashes. He put a gill of this powder to a hill, on twenty rows of corn, and omitted it on five rows through the field. There was an astonishing difference in the appearance of these different portions of the field. The corn where the bone-dust was applied was much the largest, and of a far deeper green in color.—Nash’s Valley Farmer. Liebig’s Fifty Propositions. Tue following fifty propositions are copied from the recent work of Liebig on Agricultural Chemistry, or his reply to the statements and experiments of Messrs. Lawes and Gilbert. These fifty propositions are claimed by him to be distinct truths, established by the researches of chemistry as applied to agriculture. 184 THE YEAR-BOOK OF AGRICULTURE. The growth of a plant presupposes a germ, a seed; the land-plant requires a soil; with- out the atmosphere, without moisture, the plant does not grow. The words soil, atmosphere, and moisture are not of themselves conditions; these are lime, clay, sand-soils, soils origin- ating from granite, from gneiss, from mica-slate, from clay-slate, all entirely different in their compositions and qualities. The word soil is a collective word for a large number of conditions. Ina fruitful soil these conditions are combined in proportions adapted to vege- table growth; in an unproductive soil some of them are wanting. In the same manner, the words manure and atmosphere include a plurality of terms or conditions. The chemist, with the means at his command, analyzes all kinds of soil; he analyzes manures, the air, and the water; he resolves the collective words which express the sum of the conditions of vegetable growth into their single factors, and, in his explanations, substitutes the individual for the combined values. In this process, it is evident there is nothing hypothetical. If it pass for a perfectly-established truth that the soil, the atmosphere, water, and manures exercise a influence upon the growth of the plant, it is no less keyond doubt that this influence is entirely due to the constituents of the soil, &c.; and the province of the chemist is to set these ingredients before the eyes of those occupied with vegetable cultivation, and to illus- trate their qualities and relations. 1. Plants in general derive their carbon and nitrogen from the atmosphere; carbon in the form of carbonic acid, nitrogen in the form of ammonia. From water (and ammonia) they receive hydrogen. Their sulphur comes from sulphuric acid. i 2. Cultivated in soils, situations, and climates the most various, plants contain a certain number of mineral substances, and, in fact, always the same substances, whose nature is learned from the composition of the ash. These ingredients of the ash were ingredients of the soil. All fruitful soils contain a certain quantity of them. They are absent from no soil in which plants flourish. e 8. In the produce of a field is carried off and removed from the soil the entire quantity of those soil-ingredients which have become constituents of the plant. - The soil is richer at seed-time than at harvest. The composition of the soil is changed after the harvest. 4, After a series of years, and after a corresponding number of harvests, the. productive- ness of wu field diminishes. When all other conditions remain unchanged, the soil alone becomes different from what it was previously; the change in its composition is the pro- bable cause of its becoming unproductive. 5. By means of manures, as stable-dung and animal excrements, the lost fertility may be restored. ; 6. Manures consist of decayed vegetable and animal matters, which contain a certain quantity of soil-ingredients. The excrements of animals and of man represent the ashes of food burned in the animal or human body; i.e. the ashes of plants which have been gathered from the soil. In the urine are found those ingredients of the plant, derived from the soil, which are soluble in water; the solid excrements contain those which are insoluble. Manures contain the materials which the consumed crops have removed from the soil. Itis plain that by incorporating manures with the soil the latter receives again the withdrawn ingredients, The restoration of its original composition is accompanied with the recovery of its original fertility. It is certain that one of the conditions of fertility is the presence of certain mineral ingredients in the soil. A rich soil contains more of them than a poor one. 7. The functions of the roots of plants, in reference to the absorption of atmospheric food, are similar to those of the leaves; i.e. the former, like the latter, possess the property of taking up and assimilating carbonic acid and ammonia. 8. Ammonia, which is contained in or added to the soil, comports itself as a soil-constita- ent. The same is equally true of carbonic acid. 9. Animal and vegetable bodies and animal excrements enter into putrefaction and decay. The nitrogen of the nitrogenous matters is thereby converted into ammonia, a small portion of the ammonia decays (oxydizes) further into nitric acid. 10. We have every reason to believe that nitric acid may replace ammonia in the processes of vegetable nutrition; 7.¢. that its nitrogen may be applied by the plant to the same pur- poses as that of ammonia. Animal manures accordingly furnish the plant not only with AGRICULTURAL CHEMISTRY AND GEOLOGY. 185 those mineral substances which it is the function of the soil to furnish, but also with those forms of food which it naturally derives from the atmosphere. This supply is an addition to that quantity which the atmosphere contains. 11. Those forms of vegetable food contained in the soil which are not gaseous or volatile enter the plant through its roots. The vehicle of their transmission is water, by the agency of which they become soluble and transportable. Many of these kinds of food dissolve in pure water, others only in water which contains carbonic acid or a salt of ammonia. 12, All those substances which exert a solvent action on such ingredients of the soil as are themselves insoluble, cause, by their presence, a given volume of rain water to take up a larger quantity of vegetable food than it otherwise could. 13. From the progressive decay of the organic matters of manure originate carbonic acid and ammonia salts; they constitute an active source of carbonic acid in the soil, whereby the air and water present in the soil are made richer in carbonic acid than they could be in their absence. 14, Animal manures not only offer to the plant a certain amount of soil and atmospheric food, but in their decay is supplied, in the form of carbonic acid and ammonia, an indispen- sable means of rendering soluble and available to the plant the insoluble ingredients of the soil in greater quantity and in shorter time than could occur in the absence of decaying organic matter. 15. Other things being equal, vegetation receives less water through the soil in warm, dry seasons than in wet years; the harvests in different years stand in relation thereto. A field of given quality yields smaller crops in dry seasons; by the same average temperature the yield increases to a certain limit with the increase of the quantity of rain. 16. Of two fields—one richer, one poorer in plant-food—the richer yields in dry seasons more produce than the poorer, other things being equal. 17. Of two fields alike in character, and containing an equal amount of soil-ingredients, one of which, however, has besides a source of carbonic acid—viz. decomposable vegetable or animal matter—the latter yields more in dry seasons than the former. 18. The cause of this difference in yield lies in the unequal supply of matters, both as con- cerns quality and quantity, which the plant receives from the soil in a given time. 19. All obstacles present in the soil, which hinder the solution and absorbability of the plant-food, proportionally destroy its ability to serve as food; they make the plant-food ineffective. A certain physical state of the soil is w needful preliminary condition to the efficacy of the food therein contained. The soil must allow the access of air and moisture, and permit the roots of plants to extend themselves in all directions, and seek out their nutriment. The expression, telluric conditions, comprises every thing necessary to vegetable growth that depends upon the physical qualities and composition of the soil. 20. All plants need as nourishment phosphoric acid, sulphuric acid, the alkalies, lime, magnesia, andiron. Certain families of plants require silica ; those that grow on thesea-shore and in the sea itself require common salt, soda, and iodine. In some families of plants the alkalies may be in part replaced by lime and magnesia, and vice versd. All these bodies are collectively designated as mineral food. The atmospheric food of plants is carbonic acid and ammonia. Water serves itself as food and also as a general medium of nutrition. 21. The bodies that are necessary as food for the plant have an equal value in this respect; i.e. if any one of the entire number be wanting, the plant cannot flourish. 22. Fields which are adapted to the cultivation of all species of plants contain all the soil- ingredients that are necessary for these plants; the words poor or unfruitful, and rich or Jruitful, express the relations of these soil-ingredients in quantity or quality. ' Among qualitative differences are understood differences in the solubility of the mineral ingredients, or in their capability of entering the vegetable structure through the agency of water. Of two soils which contain equal quantities of mineral food, one may be fruitful, (con- sidered as rich,) the other unfruitful, (considered as poor,) when in the latter these nutritive substances are not free, but exist in the state of chemical compound. A body in chemical combination opposes, by its attraction for the bodies it is combined with, an obstacle to 186 THE YEAR-BOOK OF AGRICULTURE. another body that tends to unite with it. This opposition must be overcome before the two will unite. f 23. All soils adapted for cultivation contain the mineral nutritive matters in both these forms.. Taken together they represent the capital of the soil; the freely soluble parte: are the movable or available capital. 24. The improvement—enriching, making fruitful—of.a soil: by proper means, but with- out addition of mineral -plant-food, implies. a conversion of a part of the inactive, unavail- able capital into a form available for the plant. 25. The mechanical operations of tillage have the object to overcome shevitigal obstacles, to set free and render directly useful the plant-food that isin insoluble chemical .combina- tion. This object is accomplished through the co-operation of the atmosphere, of carbonic acid, oxygen, and water. This action is called weathering... The presence of standing water in the soil, which cuts off the access of the atmosphere tothe Sueno compounds in the soil, hinders the process of weathering. 26. Fallow is the period of weathering. During fallow, by means of air and rain, car- bonic acid and ammonia are added to the soil.. The latter remains there when substances are present capable of fixing it, ie. depriving it of volatility. 27. A soil is fruitful for a given species of plant when it contains the mineral substances needed by that plant in proper quantity and preporiicny and in a form adapted for enter- ing it. 28. When this. soil has become unfruitful by continued use, by the removal of a series of crops without replacing the mineral ingredients carried off, it will recover its productiveness for this kind of plant by lying one or more seasons in fallow, if, in addition to the soluble and removed ingredients, it had contained a certain store of the same substances in an insoluble form, which, during the fallow, by mechanical division and weathering, are capable of becoming soluble. By the so-called green manuring this result is effected in a shorter time. 29. A field which does not contain these.mineral - forms of plant-food cannot: become fruit- ful by lying in fallow. 80. The increase of the productiveness of a field by fallow and tillage, and the removal of soil-ingredients in the crops, without a return of the latter, brings about, in shorter or longer time, a state of permanent unfruitfulness. . 31. In. order that. the fertility of a soil be permanent, the removed substances must be replaced at certain intervals ;.i.¢. its original composition must be re-established. . 82. Various species of plants require the same kinds of mineral food to their develop- ment, but in unlike quantities, or at different times. Some cultivated planta need tet silica be present in soluble form in the soil. 38. When a given field contains a certain amount of all iinds of mineral plant-food in equal proportion, and in suitable form, it will become unproductive of a single species of plant so soon as, in consequence of continuous cropping, any single kind of plant-food—e.g. soluble silica—is so fair exhausted that its quantity is insufficient for a new crop. 84.. A second plant which does not require this ingredient (silica, ¢.g.) will yield one or more crops on the same soil, because the other, for it necessary, ingredients, although in changed proportions, (7.e. not in equal quantities,) are yet present in quantity sufficient for its perfect development. \ After the second, a third kind of plant will flourish in the same field, if the remaining soil-ingredients be enough for its wants; and if, during the growth of these kinds of plants, a, new supply of the wanting plant-food (soluble silica) has been made available by weather- ing, then, the other conditions being as before, the jirst plant will again flourish. 85. On the unequal quantity and quality of the mineral ingredients of the soil, and on the differing: proportions in which they serve as food for the different kinds of plants, is based the alternation or rotation of crops in ee as well as the eau method accord- ing to which it is carried out. 36. Other things being equal, the growth of a plant, its increase in bulk, and its perfect development in a given time, stand in relation to the surface of the organs whose function is to take up the food of the plant. The quantity of plant-food that is derived from the AGRICULTURAL CHEMISTRY AND GEOLOGY. 187 atmosphere depends upon the number and surface of the leaves; that which is taken from the soil, upon the number and surface of the roots, 87. If to two plants of the same species, during the formation of leaves and roots, an unequal amount of nourishment be offered in the same space of time, their increase of mass is unequal in this time. That plant which has received more food increases more, its de- velopment is facilitated. The same difference in growth is manifest when two plants receive the same amount of food, but in unlike forms as to solubility. The rapidity of the development of a plant is facilitated by furnishing it with all the necessary atmospheric and telluric nutritive matters in proper form and at the right time. The conditions that shorten the time of development are the same as those that contribute to its amount. 88. Two plants, whose roots have an equal length and extension, do not flourish so well near or after each other as two plants whose roots, being of unequal length, acquire their nourishment at different depths in the soil. 39. The nutritive substances needed by the plant must act together in a given time, in order that the plant attain full development in this time. The more rapidly a plant develops itself in a given period, the more food does it need in that time. Annuals require more rapid supplies than perennials. 40. If one of the co-operating ingredients of the soil or of the atmosphere be partly or entirely deficient, or want those qualities that adapt it to absorption, the plant does not - develop itself in all its parts, or only imperfectly. The deficiency of one ingredient renders those present ineffectual, or diminishes their effect. 41. If the absent or deficient substance be added to the soil, or, if present, but insoluble, be rendered soluble, the other constituents are thereby rendered efficient. By the deficiency or absence of one necessary constituent, all the others being present, the soil is rendered barren for all those crops to the life of which ¢hat one constituent is indis- pensable.' The soil yields rich crops if that substance be added in due quantity and in an available form. In the case of soils of unknown composition, experiments with individual mineral manures enable us fo acquire a knowledge of the quality of the land and the pre- sence of the different mineral constituents. If, for example, phosphate of lime, given alone, is found efficacious—that is, if it increases the produce of the land—this is a sign that that substance was absent, or present in too small proportion, whereas there was no want of the others. Had any of these other necessary substances been also wanting, the phosphate of lime would have had no effect. 42. The efficacy of all the mineral constituents of the soil taken together, in a given time, depends on the co-operation of the atmospheric constituents in the same time. 48. The efficacy of the atmospheric constituents in a given time depends on the co-operation of the mineral constituents in the same time; if the latter be present in due proportion and in available forms, the development of the plants is in proportion to the supply and assimilation of their atmospheric food. The quantity.and quality (available form) of the mineral constitu- ents in the soil, and the absence or presence of the obstacles to their efficacy, (physical qualities of the soil,) increase or diminish the number and bulk of the plants which may be grown on a given surface. The fertile soil takes up from the air, in the plants grown on it, more carbonic acid and ammonia than the barren one; this absorption is in proportion to its fertility, and is only limited by the limited amount of carbonic acid and ammonia in the atmosphere. 44, With equal supplies of the atmospheric conditions of the growth of plants, the crops are in direct proportion to the amount of mineral constituents supplied in the manure. 45. With equal tellurie conditions, the crops are in proportion to the amount of atmospheric constituents supplied by the air and the soil, (including manure.) If, to the available mineral constituents in the soil, ammonia and carbonic acid be added in the manure, the fertility of the soil is exalted. The union of the ¢elluric and atmospheric conditions and their co-operation in due quantity, time, and quality, determine the maximum of produce. 46. The supply of more atmospheric food (carbonic acid and ammonia, by means of am- moniacal salts and humus) than the air can furnish, increases the efficacy of the mineral 188 THE YEAR-BOOK OF AGRICULTURE. constituents present in the soil, in a given time. From the same surface there is thus ob- tained, in that time, a heavier produce—perhaps in one year as much as in two without this excess of atmospheric food. 47. Ina soil rich in the mineral food of plants, the produce cannot be increased by adding more of the same substances. 48. In a soil rich in the atmospheric food of plants, (rendered so by manuring,) the produce cannot be increased by adding more of the same substances. 49. From land rich in the mineral constituents, we may obtain in one year, or for a series of years, by the addition of ammonia alone, (in its salts,) or of humus and ammonia, rich crops, without in any way restoring the mineral substances removed in these crops. The duration of this fertility then depends on the supply; that is, the quantity and quality of the mineral constituents existing in the soil. The continued use of these manures produces, sooner or later, an exhaustion of the soil. 50. If, after a time, the soil is to recover its original fertility, the mineral substances ex- tracted from it in a series of years must be again restored to it. If the land, in the course of ten years, has yielded ten crops, without restoration of the mineral substances removed in those crops, then we must restore these in the eleventh year, in a quantity tenfold that of the annually-removed amount, if the land is again to acquire the power of yielding a second time a similar series of crops. Weeds in Walks. Tue following modes of preventing the growth of weeds in gravel-walks, are copied from the correspondence of the London Gardener's Chronicle :— In order to prevent weeds from growing on walks, put a.layer of gas-lime under the last inch of gravel. This also helps to bind the gravel. The following is the way in which I managed walks when I was a gentleman’s gardener, In one situation I held I had three miles of gravel-walks to keep in order. In winter, when there was sufficient frost to freeze the gravel in the mornings, I employed the laborers in cleaning the walks with a half-worn out birch-broom, sweeping backwards and forwards, and then removing with a new broom what the old ones took off the surface. When the walks were covered with moss, it was scraped off with a hoe before the broom was used, After having pursued this practice for six years, my walks looked as fresh and clean as if they had been newly gravelled. Last season very few weeds made their appearance during the sum- mer; by performing the operation when frost is on the ground, you not only remove all small weeds, but you sweep off most of the seeds deposited there to vegetatesthe following summer. If docks, thistles, or dandelions appear, cut out their crowns and puta little salt on them; you will not have to repeat the salting twice in one place. On the Composition of the Salt best Adapted for Dairy Purposes. Tux nature of the salt best adapted for the dairy has long formed a subject of discussion among dairy farmers, and many opinions, and not a few fanciful prejudices, exist regarding it. It is well known that, for a long time, very decided opinions existed as to the superiority of bay-salt, and at one time the imports of that variety of salt were considerable. Bay-salt is produced in Spain by the spontaneous evaporation of sea-water, which at high-water is allowed to run into shallow ponds, in which it is gradually concentrated by the heat of the sun’s rays. The salt so deposited is always in crystals of considerable size, and generally of a brownish colors In spite of the color, itis a very pure salt, and contains but litile of the magnesian compounds present in the sea-water, which are entirely left in the mother-liquor from which the crystals have been separated. Lime and magnesia—especially the chloride of magnesia existing in salt—have a very powerful affinity for water, and retain it in considerable quantity. The chloride is even a deliquescent substance—that is to say, it absorbs moisture from the air; so that a sample of salt containing it, even if artificially dried, will again become moist, if kept for some time. AGRICULTURAL CHEMISTRY AND GEOLOGY. 189 For this reason the dryness of a salt is an excellent criterion of its purity, and, in the ab- sence of an analysis, may serve to guide the purchaser. As far as the use of salt for the dairy is concerned, it seems obvious that we must mainly depend on its purity; and it was, doubtless, for this reason that bay-salt was formerly preferred. ” It is necessary to be remarked, however, that the form of the salt is not immaterial; and that when in fine powder it is clearly preferable to large grains or crystals, and that because it admits of more thorough incorporation with the butter, and its antiseptic effects will be secured by the use of a smaller quantity than would be necessary if in large crystals. As a general rule, the salt now met with in commerce is very fine; but instances are some- times met with in which the magnesia salts are present in considerable quantity. I have seen specimens containing as much as 8 per cent. of chloride of magnesium and sulphate of magnesia, and such samples contain much water; so that the amount of pure salt does not exceed from 89 to 90 per cent. Such salt should be carefully avoided for dairy purposes; and all care should be taken to obtain it as pure as possible.—Prof. Anderson, Highland Ag. Soc. Qualities of Pasturage. Tue following remarks on the qualities of pasturage are taken from the Transactions of the Croyden Farmers’ Club, England :— What is the cause that some pasture will readily fatten stock fit for the butcher, while others, with an abundance of grass, will only keep stock merely in a growing or thriving condition 2 That such is the fact, all farmers are and have been aware of for ages past, but as to the causes of these differences no good or sufficient reason has been assigned. I will, however, state what I consider an explanation why the one does fatten so readily, and why the other does not, and also give reasons and authorities for such opinions, First, the fattening quali- ties of what are termed rich grazing lands may probably be owing to all the several elements of nutrition being present in such quantities in relation to each other, and in states of com- bination, that are well adapted for being assimilated and deposited as fat and muscle, thereby requiring no unnecessary expenditure of the vital power or principle to produce such effect. Dr, Thomson, in his ‘‘Experimental Researches on the Food of Animals,’’ says—“ Besides the necessity for the presence of the same materials in the food which exist in the blood, it is requisite that each should bear a certain relation to the whole.” Now it is reasonable to think that it is so, and also that where one or more elements in the food are in excess, that there must be an expenditure of vital power to get rid of such excess. Prof. Johnston also says—‘‘It has been ascertained by physiologists that all the parts of the body undergo a slow and sensible process of renewal, the place of that which is removed being supplied by new portions of matter derived from the food, and that this renewal goes on so rapidly, that in the space of time the whole body of the animal is renewed. I may observe that we know by experience when a rich pasture is broken up, it takes many years when again laid down to pasture before it at all approaches to its former fattening powers, and also before it again produces all those numerous grasses (if ever it does again) which grew upon it before it was broken up. There may be another cause which aids in the fatten~ ing qualities of such pastures; and that is the presence of some plant or plants containing one or more of those classes of compounds which have the property of changing one compound into another, thereby saving an expenditure of the vital power in digestion.” Why is it, that the majority, I may say, of meadows which produce an ample crop of herbage to satisfy the appetite of animals grazing thereon, will not fatten them fit for the butcher without the aid of some artificial food? Here again, as in the former case, we can only conjecture. We are certain that all the elements requisite to form the animal are pre- sent in the herbage and hay grown thereon, from the fact that animals bred on, and fed upon, the produce of such pastures or meadows come to full maturity in health and strength; still, it does not follow that the several quantities of these elements are in such a relation to each other, and in such combinations of forms, as not to require considerably more expendi- 190 THE YEAR-BOOK OF AGRICULTURE. ture of the vital powers to convert them into the various compounds to be assimilated and appropriated by the different organs and parts of the body, than would be required in the former case upon the good grazing land; added to which, another, and I think, perhaps the principal, disturbing cause may probably be owing to the presence of some plant or plants among the herbage which exercise an unfavorable action upon the fat-producing, powers, and which, from the soil being peculiarly adapted for their flourishing growth, may be pro- duced in bulk, as compared with the aggregate herbage grown, sufficient to bring about the marked difference noticed. To make myself and meaning here more clearly comprehended, I will suppose a case:—We know that some plants excite the kidneys to increased action. Supposing, therefore, that in any pasture (however abundant, it might be in quantity) there were growing some plant or plants which exercise an exciting influence upon the kidneys, provided that influence was not energetic enough in the first instance to produce disease of those organs, the secretion from them would be much, as well as permanently, increased under the daily stimulant taken with food. Now, as that secretion is wholly derived from the blood, we can readily form an idea that there must be a much larger quantity of blood required to furnish the increased quantity of urine secreted, with all its salts and other organic compounds,- whether immediately derived from the food, or from the disintegration and breaking up of the already’ formed parts of the body. Such being the case, it would be natural to conclude that the animal would not become what we call fat under the increased consumption of the blood in that direction. This may seem to be putting an extreme case; but we should reflect that there is no organ or part.of the body, varying, of course, in the different species of animals, on which there is not some vegetable..production that exercises a certain specific influence, more or less, according to the constitution, the breed, and sus- ceptibility of the individual animal. The same effects are also true as regards the inorganic elements of nature; and it is upon those facts, the results of observation, that the agt of medicine is founded. I say again, if we consider this, there may be some reason for sup- posing that the accumulation of any superfluous quantity of fat and muscle, to the extent that we consider an animal to be fatted, may be retarded by the presence of any such plant or plants, in an undue proportion to the requirements of nutrition. , “The next consideration is, What can be done to improve those pastures? All agree that where drainage is required it benefits their feeding qualities in most instances; draining is more often required in pasture lands and meadows than is generally supposed. It increases the number of the finer sort of grasses, as well as increases the bulk of those already grow- ing; it also gets rid of, or greatly weakens, those plants which delight and flourish in most soils, which, though they may not be called wet ones, still generally retain water to a con-' siderable extent in the subsoil; and among those plants which flourish in moist soils are many not favorable to animals. These pastures will also be greatly improved by high manuring, more especially where draining was required and has been done; for supposing all the inju- rious plants to remain which are natural to the soil, their bulk and produce, as compared with the more nutritious grasses, will be greatly lessened by the soil being made more rich and congenial for the growth of the finer sorts, which will, by their greater numbers and more vigorous growth, check and weaken the others; consequently there would be in uw given weight of herbage a much larger proportion of the really nutritious grasses to the injurious ones, than when the pasture was in its natural state, therefore with a less disturbance of the natural functions of the organs of the animals grazing upon it. Much-benefit, I think, would arise if botanists, and. those who make plants their study, were to direct their attention specially to the qualities and properties of those plants and grasses which grow in our meadows and pastures. Farmers have not time for such details; nor, indeed, is it necessary that we should enter into them. -All we can do is to observe for ourselves, and bring our reasoning faculties to bear upon the experiments and facts which are and may have been brought to light by the chemist, the botanist, the physiologist, the entomologist. Our endeavor should be to think and reflect whether any or what relation a new discovery or fact already known bears upon any department of farming: The improvement which has taken place in our reeds of cattle, sheep, and pigs, and which, I have no doubt, has quite doubled our supplies of animal food in fifty years, has not been brought about by scien- AGRICULTURAL CHEMISTRY AND GEOLOGY. 191 tific men, but by men of close observation and deep reflection, which qualities are generally the parents of sound judgment. It has been ‘accomplished by practical farmers in every sense of the word, who by observation of a few of the laws of organic life, as manifested in animals living under different conditions as to food and climate, and availing themselves of those laws, have gradually brought about this vast improvement in our breeds of stock.— London Farmers’ Magazine. : Hay Making. Tue following article from the Irish Economist, with extracts from Morton’s Cyclopedia of Agriculture, (English, ) although referring in part to methods and grasses foreign to this coun- try, still contains truths worthy of consideration by every farmer :— Chemistry informs us that of the various ingredients which compose grass, those portions which are immediately soluble in water are the most fitted for purposes of nutrition; and, therefore, it should be cut at that period when the largest amount of gluten, sugar, and other matter soluble in water is contained in it. And that period is not, generally speaking, when the plants have shot into seed; for the principal substance is then woody fibre, which is totally insoluble in water, and therefore unfitted for being assimilated in the stomach. It has been shown that ‘‘ when the grass first springs above the surface of the earth, the chief constituent of its early blades is water, the amount of solid matter comparatively trifling; as its growth advances, the deposition of a more indurated form of carbon gradually becomes more consi- derable, the sugar and soluble matter at first increasing, then gradually diminishing, to give way to the deposition of woody substance,” the saccharine juices being in the greatest abun- dance when the grass is in full flower, but before the seed is formed. During all the latter part of the process of fructification, the formation of the seed, &c., the sugar rapidly decreases in quantity, and when the seeds have arrived at maturity, the stem and leaves begin to decay; so that, if the grass is not cut when in flower, a great amount of nutriment will be wasted. Many of the natural pasture grasses, however, are exceptions to this rule, some possessing a greater nutritive value when the seed is ripe, than at the time of flowering. In the cock’s- foot grass, (Dactylis glomerata,) for instance, the proportional value at the time the seed is ripe to that at the time of flowering, is as seven to five; the value of the grass of the sweet-scented soft grass, (Holcus odoratus) when seeding, exceeds that at the time of flowering in the porpor- tion of twenty-one to seventeen; and with the meadow cat’s-tail, or timothy grass, (Phlewm pratense) the culms are found to contain more nutritive matter when the seed is ripe, than those of any other species of grass that have been submitted to experiment—the value of the culms simply exceeds that of the grass when in flower in the proportion of fourteen to nine. But though there is more nutriment contained in the seed crop of these grasses than in the flower- ing crop, nevertheless the loss of lattermath, (later mowing,) which would have been produced in the time the seed was ripening, would more than outweigh the superior quantity of nutritive matter contained in the seed crop; and by aiming at the greater amount of nutriment con- tained in these grasses at seeding, a loss is sustained not only in the lattermath, but in the bulk of the hay itself; for although the crested dog’s-tail grass (Cynosurus cristatus) yields just twice as much grass when the seed is ripe as at the time of flowering, the majority of the grasses possess a much greater quantity of produce when flowering than at any other time. THe grass of the Welsh fescue is of equal value in nutriment at each stage of its growth;, and the nerved meadow grass (Poa nervata) is equal, both in nutriment, quality, and quantity of produce, at flowering and seeding; but nearly all the other varieties combine the properties we have been describing—namely, of producing the greatest weight of grass, and also the largest amount of nutritive matter, when in flower... The meadow fescue (Festuca pratensis) is of more value when flowering than when the seed is ripe, proportionally as three to one; the crested dog’s-tail, although yielding much less grass at that time, contains nearly twice the quantity of nutritive matter when flowering as when the seed is ripe; and the tall, oat-like soft grass, (Holeus avenaceus,) at the time of flowering, exceeds its value when the seed is ripe, in the proportion of five to two. But without multiplying examples, it is obvious, from the foregoing remarks, that nearly every species of grass—no matter whether it contains most nutriment when flowering or when seeding—yields the most profit in hay and lattermath if it 192 THE YEAR-BOOK OF AGRICULTURE. be cut when in flower, ‘‘It has, indeed, been proved that plants of nearly all sorts, if cut when in full vigor, and afterwards carefully dried, without any waste of their nutritive juices, contain nearly double the quantity of nutritive matter which they do when allowed to attain their full growth, and make some progress towards decay.” Now, the different kinds of grasses begin to flower at very different periods; and as iti is evident that the best time to mow is when the greatest number of the most valuable grasses are simultaneously in flower, we may, perhaps, say that the herbage should be in that state of forwardness which indicates the full blossoming of all the earlier pasture grasses, and the ripeness of seed of the earliest; or, in other words, the seeds of the sweet-scented vernal grass, (Anthoxanthum odoratum,) sweet-scented soft grass, meadow fox-tail, (Alopecurus pra- tenses,) sheep’s fescue, (Festuca ovina,) soft broom grass, (Bromus mollis,) etc., may be com- pletely ripe; and the smooth-stalked meadow grass, (Poa pratensis, ) hard and smooth fescues, (Festuca duriuscula and Festuca glabra,) common quaking grass, (Briza media,) and crested dog’s-tail, may all be in full blow. This will generally be about the middle of June. If the cutting of the crop be much protracted, the plants become withered at the bottom of their stems: thus the roots are injured, the future growth of the blades is weakened, and the eddish or aftermath. materially lessened in quantity and deteriorated in quality, while the ripening of the seeds greatly exhausts the land. On the other hand, if cut too soon, there will bea loss in the quantity of hay; the lower or shorter portion, one inch in the height of which will weigh as much as two inches of the top, will not have sufficient time to grow to a profitable length, and a loss will be thereby incurred by the grass withering too much when being made. It is much better to be too early than too late. The proper season for mowing the grass, so as to secure the largest amount of nutrient pro- perties within it, being thus determined, the next consideration is—the preservation of these useful qualities in the hay. Experiments show that, out of the various constituents of which grass is composed, hs mu- cilage, starch, gluten, and sugar, which are soluble in water, are alone retained in the body of an animal for the purpose of life, the bitter extractive and saline matters being considered as assisting or modifying the functions of digestion, rather than as being truly nutritive parts of the compound, and being voided with the woody fibre. The woody fibre serves only to give bulk to the food, and therefore distension to the stomach, which, when moderately filled, brings those muscles into active exercise which tend so much to promote healthy digestion, by keep- ing the food in constant motion. The principal object, then, which is to be aimed at in hay-making, is, to retain the soluble portion of the grass in perfect integrity. This cannot be completely accomplished because of the imperfection in our present mode of hay-making, and the many casualties attending it. From various experiments made by Dr. Thomson, it has been found that 887} parts (by weight) of grass form only 100 when made into hay. This amount of grass, under favorable circumstances, contains of matter soluble in hot water 28-13 parts, and in cold water 8-21 parts; but instead of this amount, the equiva- lent quantity of hay, or 100 parts, contains only 16 instead of 28 parts soluble in hot water, and 5-06 instead of 8} parts soluble in cold water. A very large proportion of the soluble or nutritive matter of the grass has obviously disappeared in its conversion into hay. The result of the process has therefore been to approximate the soft, juicy,.and tender grass to wobdy fibre, by washing out or decomposing its sugar and other soluble constituents. ‘ These facts enable us to explain the reason why cattle consume a larger amount of hay than is equivalent to the relative quantity of grass. Thus, animals which can subsist upon one hundred pounds of grass, should be able to retain the same condition by the use of twenty-five pounds of hay, if the latter suffered no deterioration in drying; but experiments have shown that a cow, for instance, thriving on one hundred pounds to one hundred and twenty pounds of grass, re- quires twenty-five pounds of hay and nine pounds of barley or malt.” The great cause of ' this deterioration is the water which may be present, either from the incomplete removal of the natural amount of water in the grass by drying, or by the absorption of this fluid from the atmosphere. <‘‘ Water, then, existing in hay from either of these sources, will induce fer- mentation, a process, by which one of the most important constituents of the grass—namely, AGRICULTURAL CHEMISTRY AND GEOLOGY. 193 sugar—will be destroyed. The action necessary for the decomposition of the sugar is in- duced by the presence of the albuminous matter of the grass; and the result is that the sugar is converted into alcohol and carbonic acid; and that alcohol is produced in a heated hay- stack, in many cases, may be detected by the similarity of the odor disengaged to that per- ceptible in a brewery.” ' The process of hay-making, then, is the removal of this moisture from the grass; and Dr. Thomson has found that the only method which succeeds in preserving grass perfectly entire is by means of artificial heat. The quantity of water or volatile matter capable of being removed from hay at the tem- perature of boiling water varies considerably; the amount of variation during his experi- ments being from twenty to fourteen per cent. If the lower percentage could be attained at once by simply drying in the sun, the process of hay-making would probably admit of little improvement; but the best new-made hay that he has examined contained more than this amount of water, the numbers obtained verging towards twenty per cent. When it contains as much as this, it is very liable to ferment, especially if it should happen to be moistened by any accidental approach of water. Rye-grass contains, at an early period of its growth, as much as eighty-one per cent. of water, the whole of which may be removed by subjecting the grass to a temperature considerably under that of boiling water; but even with a heat of 120°, the greater portion of the water is removed, and the grass still retains its green color— a character which appears to add greatly to the relish with which cattle consume this kind of provender. The advantages attained by this method of making hay are sufficiently obvious. By this means all the constituents of the grass are retained in a state of integrity; the sugar, by the absence of the water, is protected from undergoing decomposition ; the coloring matter of the grass is comparatively little affected, while the soluble salts are not exposed to the risk of being washed out by the rains, as in the common process of hay-making. From the above chemical observations, made by Dr. Thomson, in his recent researches upon the food of animals, we learn the theory of hay-making; the inquiry now is—How, in practice, can we best approximate to the correct principles laid down ? It is an essential point that the mowers should be good workmen, and perform their work neatly and evenly, making the scythe cut as near the ground as possible, in order to insure the greatest bulk of hay, and facilitate the springing up of the young shoots of the eddish or aftermath. They generally begin to work before sunrise, and remain until after sunset; from one acre to an acre and a half, according to the bulk of the crop, being a fair day’s work for aman. As soon as the dew is off, the mowmen should be followed by men and women with forks, who shake and spread the swaths evenly over the whole surface of the meadow; or this may be most economically and expeditiously done by means of a ‘‘tedding machine,” drawn by a horse, which will do the work of twelve or fifteen hay-makers, and distribute the grass more thinly and evenly as it crosses the field. And this must not be allowed to lie long beneath the scorching heat of the sun without being turned; for by thus doing, the upper part becomes brown and withered, whereas it is desirable to keep it as green as possible. All the grass which has been tedded and turned during the day ought to be thrown together the same evening in ‘‘ windrows ;” that is, long rows through- out the field, gathered together by the hay-makers working in opposite directions, the two outside women or boys using rakes, the others forks, the hay gradually accumulating, while thus being sent on from one to another towards the place of the intended row, until it forms, from a party on each side, a double row, and two men follow, putting these two into one com- pact “‘windrow,” about five feet wide and three high; or the hay may be put together into small heaps or “‘ footcocks,” the former method being preferable for expedition, and affording sufficient protection from heavy dews, the latter more secure from the injury of rain, and may be adopted if the weather prove cloudy or adverse. The following morning—or on the return of suitable weather—the whole must again be thrown out, so as to secure the greatest possi- ble benefit from the sun’s rays and drying winds: and the grass mown on the preceding night and early that morning may be tedded when the dew is off, and afterwards turned; and, pro- vided it be fine drying weather, the first day’s hay will now be sufficiently “‘made;” that is, it will have lost most of its moisture—the chief part of its natural juices will remain; and as 13 194 THE YEAR-BOOK OF AGRICULTURE. it has been well scattered about and frequently turned, this will have been effected without some portions of the grass being too much withered and others still too succulent. It still retains its fine light-green color, and the farmer’s aim now is to secure it with the greatest possible haste. For this purpose, the hay is gathered together into rows and the rows divided and collected into ‘‘haycocks,” which may be done by forking; but if the sky is overcast and threatens rain, the windrows should be drawn up into large cocks by horses, two horses walking, one on each side the row, dragging a rope after them, which passes round the end of the row; two men ride upon this rope, and as the horses proceed, the hay rises up between them, forming a heap; and this, having slid far enough to accumulate a sufficient quantity, the rope is lifted up, the hinder portion of the mass pulled up on to the top, and another cock commenced. Care should be taken that the cocks are ‘“‘made up” neatly and well, to keep out the rain, and the horses or hand-rakes must be kept going during the whole time. All the hay must, in due course, be made and cocked after the same manner. Unless the aspect of the sky betokens approaching showers, the smaller kind of haycocks, made by sae. up the windrows with forks into proper-sized heaps, will be best. The next morning, or soon as the weather permits, they may be well thrown out in “ stad- dles” of a few yards in width, to insure the hay being sufficiently well dried, and it will then be ready for loading. Of course the farmer must not be implicitly guided by any given rules for hay making; in this operation he has to depend upon a very fickle and changeable power—namely, the influ- ence of the weather, and he must vary and modify them to suit circumstances. The object to be aimed at can alone be exhibited to his view, and a model.method pointed out for him to imitate as closely as he can. The description given of the chemical nature of this process explains to the haymaker what he has to do; and, perhaps, the following truths will assist him in discovering the most eligible way of doing it: * 1. He must remember that the chief point is to preserve the hay from dew and rain; water washes away the soluble salts and other matters, and when in the stack will cause fermenta~ tion, and that injures the hay by destroying some of its most valuable properties; therefore, bring it into windrows or make it into footcocks at nightfall, and never open it in the morning until the dew has evaporated. 2. Bear in mind that if the weather is unfavorable, the less it is disturbed the better, and the longer will it retain its native powers. Hay has been found to preserve a great amount of its nutritive qualities for many days—nay, even weeks—when mown wet, or when saturated with the rains while lying in the swath; if, therefore, the weather be unfavorable, it will-be better not to tedd the hay at all, nor even turn over the swath. If repeatedly dried and wetted again, it soon becomes valueless; this error of meddling with hay amid frequent showers must, if possible, be avoided; for it is far better to have it somewhat tainted in the haycock than thus exhausted of its nutriment, and spoilt by repeatedly being spread. 8. Take care not to allow it to remain long under the hot beams of the sun without being turned; this will preserve the color and fragrance of the grass, so that without baking it too much, (thus destroying its virtues,) it may be so dry that as little heating or fermentation as possible shall occur‘in the stack, remembering also that coarse grass does not require so much “making” as fine succulent herbage. In leading to the stack, all the force of the farm must be brought into caectateie if neces- sary, as much depends upon the speedy and proper securing of the hay. The shape of the rick is not 2 very important consideration, but an oblong form is perhaps the best—small in size if the farmer has been unable properly to make his hay; but if it be in good order, the larger the better, as less surface in proportion to the quantity will thus be exposed to the atmosphere to imbibe moisture or have its goodness washed and dried out. Stacks, both of meadow hay and the artificial grasses, are sometimes ventilated by means of funnels up the interior, either consisting of rough wooden framework, or made by keeping open a hole with a skep or similar appliance, drawing it up and treading the hay round it as the stacking pro- ceeds, for the purpose of preventing the hay from becoming mow-burnt by thus letting off the superabundance of hot vapor, This may be regarded as an advantageous practice, although the hay around the chimney generally becomes mouldy unless the funnels be covered AGRICULTURAL CHEMISTRY AND GEOLOGY. 195 up before all the heat has passed off. A desirable, and probably much better and safer plan, when the hay harvest has been accompanied by wet weather, is to place a few layers of straw in the stack at intervals. This will absorb the moisture from the heating hay, and prevent the risk of fire. In clover and sainfoin stacks, mixed layers of straw are particularly useful, (especially when the straw has been stacked very green,) as the straw not only absorbs the superabundant moisture occasioned by the peculiar succulence of the herbage, but becomes itself almost as good as the hay; and the whole together cuts up into most admirable fodder. Every grower should possess a rick cloth, either that kind supported by poles and ropes over the stack during the time it is being built, or a common cloth sufficiently large to throw over the stack to protect it from wet. They prove also exceedingly useful, both in the corn and hay harvests, in covering down stacks, The sides of the stack should lean well outwards, so as to miss the drip from the eaves; and after its subsidence or settling, it should be well trimmed—that is, the bent, &. pulled out by hand, and the corners neatly tucked in, the trimmings being employed to top up the stack. It is then securely thatched; and care ought to be taken that in all future cuttings for fod- der, the interior should not be unduly or needlessly exposed. - Grape Mildew. M. River states that in 1847 he was invited by Dr. Loze to examine a sort of wine to which extraordinary properties were attributed. Another invitation to the same effect was received, in 1849, from M. Souleyet, who spoke highly of the efficacy of this wine in curing some dis- eases. M. Rivet found iodine in the wine; and he learned that the vines which produced it were not attacked by the oidium, and that M. Mouries had effected remarkable cures among yines by manure containing iodine. Having made some experiments, the following facts were elicited :— 1. Manure produced by the fermentation of marine plants has been employed in some parts of Spain since 1835. The soil which has received this manure contains, on the average, 1-600000 part of iodine. The vines which grow in it have never, up to the present time, been attacked by the oidium. 2. The wine made from these vines has some peculiar qualities. In commerce, where it is rare, it bears the name of Malaga Rives de Mer. It is of all vegetable productions the richest in iodine, containing on the average 1-50000 part of that principle. 8. Iodine found naturally in plants or animals possesses an action which, by its nature and intensity, cannot be produced by its chemical preparations. M. Didot pointed out the ab- sence of oidium on vines, the wood of ‘which had been smeared over with coal tar. , M. Lapierre-Beaupre stated that according to his observations the mildew does not attack the stem; the vines which were diseased in 1852 even appeared to have for the most part escaped in 1853. It was stated by M. Pascal that acetate of lead prevents the development of oidium and other cryptogams. M. Sourdette proposes a simple and inexpensive preserva- tive, which has proved successful in some experiments made during two years in the neighbor- hood of Bordeaux. In order to prevent and arrest the development of the oidium, it is suffi- cient, three weeks after pruning the vine, to smear the stem and shoots with pure liquid tar, applied with a large brush. This operation costs very little, and has proved very successful on all the plants on which it has been performed, even although they were in the midst of infected vines.—Comptes Rendus. When Should Grain be Cut? A most important question for the farmer. Careful observation, and some little experience during twenty years’ residence in a great wheat-growing country, has convinced the writer that it is fully ten per cent. profit on the crop to the farmer to cut his wheat before the grain is fully ripe. Our rule is to commence cutting as soon as the earliest part of the crop has passed from the milky into the dough state. There is no occasion to let it lay to cure when cut while the straw is still partially green. 196 THE YEAR-BOOK. OF AGRICULTURE. Bind it up as fast’ as cut, and set the bundles in stooks, ‘“‘Dutch fashion”; that is, two and and two leaning together, in dozens, .or twenties, or any given number, so as to give an even count. Set in this way, the most unripe grain will cure and perfect itself. _ The advantages are, the grain is heavier, sweeter, and whiter: there is less loss of shat- tered grain; the straw, where that is an object, is so much better feed as make it worth while to cut early, even if there were a loss on the grain, which is not the case. For seed, the best portion of the field should be set apart and left to mature until fully ripe, and then carefully cut by hand, and very carefully handled, because the very grains which should be saved for seed are the ones most easily shattered. Give these bundles a slight thrashing, and give the grain a thorough winnowing;. screen out all but the most plump kernels, and sow those for your next crop, and you will succeed in See. both quality and product. This question, of ‘‘ When should grain be cut?” has been agitated for many years, both in this country and Europe. In the second volume of British Husbandry, it is said— “The question has been for some time agitated regarding the state of ripeness on which grain should be reaped, and it has been recommended, as a general rule of practice, to cut down the crop before the uppermost grain can be shaken out. Taking all things into con- sideration, it seems to be the most prudent plan to have the grain cut before it is fully ripe; but in this, a medium course should be adopted; for although grain, if allowed to become too ripe, assumes a dull, husky hue in the sample, yet, .if not ripened enough, it shrivels in ie drying.” Cadet de Vaux asserts that “‘ grain reaped eight days before the usual time has the berries larger, fuller, and finer, and better calculated. to resist the attacks of the weevil. An equal quantity of the corn thus reaped with corn reaped at maturity gave more bread, and of bet- ter quality. The proper time for reaping is that when the grain, on being pressed between the fingers, has a doughy appearance, like a crumb of bread just hot from the oven.” Mr. €. Howard, in the Report on Select Farms, says— “Wheat ought never to be allowed to remain uncuttill it is fully ripe. . ed easily made, will prove to every cultivator of it that by permitting it to stand until the straw has lost its succulency, he gains nothing in plumpness or bulk of grain, but loses much in its color and fineness of skin; besides which, he incurs the risk of shelling by the high wind, or by a being cut under the influence of a burning sun. . When fully ripened by standing in the shocks, no acy hour should be lost in getting it well sécured.” Loudon observes that ‘‘in harvesting wheat the best farmers, both in England and on the Continent, agree that it ought to be cut. before it becomes dead.ripe. When this is the case, the loss is considerable, both in the field and the stack-yard, and the grain produces an infe- rior flour.” > An experienced Pennsylvania farmer of our acquaintance always cuts his oats while the straw is green. This he learned to do, contrary to all old practice, by accident. His hay crop was short one year, and he determined to cut his oats green—losing, as he thought, the grain for the sake of the straw. For seed, he left a strip through the middle of the field, where the oats were best. When he came to thrash, he was surprised to find ‘the early-cut' straw yielding as much and as plump grain as that which stood till it was dead ripe, while the straw was incomparably better; in fact, the stock ate it as rapidly as they would timothy hay.—Louisville Journal. On the Proximate Principles of the Bran of Wheat. Some years since, M. Millon, as a result of long labor, arrived at the conclusion that bran is an alimentary substance; that bran bread and pilot bread was more healthy and more nu- tritious than white bread. This opinion has been contested, and Millon has been ironically attacked for not conforming to the regimen he recommends. But the opinion is now sus- tained. by Chevreul, who declared his views on the occasion of a memoir of M. Mourits on AGRICULTURAL CHEMISTRY AND GEOLOGY. 197 this subject. It is known, too, that according to Magendie’s experiment dogs could live on bran bread, while they died when fed on wheat bread. This fact, which appears singular, is explained through the researches in question. 7 The inner surface of bran is covered with azotized principles, which, like diastase, will dis- solve starch, changing it into dextrine and sugar. These principles differ somewhat from diastase. Still it is demonstrated that bran acts as a ferment in fermentation, and conse- quently in a similar manner in digestion.—Siliman’s Journal, Paris Correspondence. On the Value of Cotton-seed Cake as Food for Cattle. A writer in the Scotch Journal of Agriculture gives the following results of a series of experiments ‘in respect to the value of the cotton-seed cake as food for cattle and other stock, The cake used was obtained from a quantity of cotton-seeds which had been pressed in'a mill near Edinburgh, for the purpose of extracting the oil contained in them. Before giving the details of the experiments, which seem to prove that the. cotton-seed cake is as valuable in some respects as oil meal, linseed'cake, or bean meal, we would call attention to the analysis of the cotton-seed cake, made by Dr. Anderson, as compared with other feeding substances: 4 Cotton- Linseed | Rape | “seed | Beans. | Oats. | Barley. cake. cake. cake. vy. Water v.cceecsssecccsessee 1244| 10-68| 11-19] 15-84] 12:66] 15-97 z 12°79} 11:10 9-08 1:59} 6°12 1:88 Albuminous compounds 27°69 | 29°53] 25:16]: 4°70} 10-16] ‘7°74 ASH svssssnsesewasecadesys is 6°13 779 5°64) 3°36 2°66}. 214 Other constituents............ | 40°95) 40°90) 48°93| 54:51| 68-40) 72:27 100-00 | 100-00 | 100-00 | 100-00 | 106-00{ 100-00 Old cacingveneausds Nitrogen .......scscceceseseees see 433/ 4:38] 3:95] -3:89} 1°60] ‘1:22 Silica ......... cae GPUS |< TB2 | sy iadeaee |! Gevcans' || arson Phosphates .... wie 3°87) 2:19) 0-49} 0°65 0°56 Phosphoric acid........ “0° 0°39 0-15| 0-46] 0-01 0°35 It will be seen from this table that cotton-seed cake holds a respectable place as an article of food for cattle; while oats and barley, which are considered by some intelligent and experienced feeders as’ equal, weight for weight, to linseed cake, are very deficient in oil and albuminous compounds, the two most important constituents in any feeding-stuffs. It is as well to mention, however, that this opinion has been disputed by many eminent feeders. The parcel of cotton-seed cake used was of a yellowish-brown appearance, very brittle, of an agreeable nutty flavor. We first tested, says the writer, its palatableness: pieces were laid before cattle, sheep, and pigs, which devoured them with an avidity and relish seldom manifested towards kinds of food to which they had not been accustomed. We next insti- tuted an experiment with it: eight cattle, that-had been fed on turnips and straw all winter, . were selected in the beginning of March; four were fed on cotton-seed cake at the rate of 6 pounds per day to each, and the other four on'a mixture composed of 2} pounds linseed cake, 24 pounds of bean meal, and 1 pound of treacle, with chaff, and a little salt; both lots got, besides, as many Swedish turnips-and as much straw as they could eat. This feed was continued for six weeks, at the end of which time, the quantity of cotton-seed cake being nearly exhausted, the cattle were gold fat to a butcher, after the best two in the whole lot, which were chosen from those fed on the cotton-seed cake, had obtained the premium for the _ best fat at a district agricultural show. We considered this experiment favorable for the cotton-seed cake, and; though somewhat vague and by no means rigidly conducted, it was quite sufficient to warrant a more extended experiment. A new supply of seed having been obtained, six cattle were selected which had been fed on turnips and straw up to the 10th of January, when the experiment commenced; two of them got, in addition to their turnips, 4 pounds of linseed cake; two, 4 pounds of cotton-seed cake; and two, 4 pounds of bean 198 THE YEAR-BOOK OF AGRICULTURE. meal, till the 10th of April, when they were slaughtered. They were measured on the 10th of January and 10th of April, (when the cotton-seed cake was finished,) and weighed after they were slaughtered. The results are as follows :— Weight | Weight Weight after by mea- | by mea- | being slaughtered. ‘ surement, t, Jan. 10. | April 10. Beef. Tallow. Pounds. | Pounds. | Pounds. | Pounds. 1, Linseed cake. 894 977 903 56 2. Linseed cake.... caoe 888 966 911 59 3. Cotton-seed cake......04. 861 950 955 49 4, Cotton-seed cake.......0 830 912 875 63 5. Bean meal .......sssccesees 888 945 882 58 6. Bean meal ........e00 _ 860 961 920 52 They consumed each daily during the experiment about 150 pounds of Swedish turnips, be- sides straw. The cattle, when slaughtered, were not as fat as we would have wished; but we thought it better to send them to. the butcher, as the cotton-seed cake at our disposal was finished. This will account for the actual weight being less than the weight by mea- surement, as cattle not in w ripe condition never weigh out to the measurement, u fortiori. The difference between the real weight and the weight by measurement, on the 10th of January, will be greater than the difference between the real weight and the weight by mea- surement on the 10th of April; so that the real increase in weight during the three months of experiment is not indicated by the figures above. All that we wish to prove is, that cattle fed on cotton-seed cake made as much progress as those fed on linseed cake and bean meal— a. fact which was abundantly manifest both from the appearance and touch of the animals. Subsequent experiments were made with cotton-seed cake obtained from New Oxleans, with nearly the same results. In some instances the cattle refused to eat it, unless pre- viously mixed with other food. This dislike was attributed to'the cake having been injured by sea water or other causes. Several other persons who used the New Orleans cake ex- pressed their satisfaction with it, and esteem it valuable. In some cases the cattle did not seem disposed to eat it at first, but eventually did so, when they became very fond of it, and greatly improved. , Two methods are adopted in New Orleans for the extraction of the oil from the cotton- seed. They are as follows :— f Plan I.—1. Break up the cake as fine as can be in a cast-iron or other mill; 2. crush it as fine as can be through rollers; 3. put it into large casks, and puta jet of steam into it; then the oil, the stearine, and tle oleine will rise to the top, and the seed below is prepared for the feeding of cattle. Plan II.—Crush and run it between rollers; apply a jet of steam into it.till it is properly cooked; then put it into the presses. It will give 6 quarts of oil to each 100 pounds of cake. In addition to the oil contained in the cotton-seed, there is also an exceedingly bitter prin- ciple, which has never been examined chemically. This principle would undoubtedly act medicinally. When the fresh cotton-seed is examined under the microscope, it may be noticed in the form of minutered spots or vesicles, distributed uniformly throughout the white part of the kernel. In the mealed or crushed seed the action of this principle is not so strikingly noticed; it still, however, exists, and is undoubtedly the cause of the repug- nance which cattle sometimes manifest towards it.—Hditor of the Year-Book. Farinaceous Aliment Obtained from Straw. Tue attention of agriculturists in France has been recently directed to the discovery of a method of converting straw into a kind of bran. This discovery has been claimed by two individuals. The first is a miller near Dijon, who, tt is said, on trying the mill-stone of a new mill, discovered the possibility of converting straw into a nourishing food. The second, M. Jos. Maitre, of Vilotte, near Chatillon. : This distinguished agriculturist, known for the purity and perfection of. his breeds of AGRICULTURAL CHEMISTRY AND GEOLOGY. 199 sheep, conceived the idea of converting into farina not only the straw of wheat and other grains, but of hay, trefoil, lucern, sainfoin, ete. His efforts are said to have been perfectly successful, and his discovery arrived at, not by chance, but by long experiment and research. The aliment which he has produced is said to be a complete substitute for bran. It is given to sheep and lambs, who consume it with avidity, and may be given to all other graminivorous animals as a grateful and substantial food. We know in this country that the mere chopping of straw adds greatly to its powers by facilitating mastication and digestion. We may believe that » more perfect comminution of its parts will produce a corresponding effect, and extend very widely the uses of straw and other fodder as a means of feeding our domestic animals.— Quarterly Journal of Agriculture. On the Relative Value of different kinds of Meat for Food. M. Mancuat, of France, took twenty grammes of the muscle of the pig, ox, sheep, calf, and hare, which contained neither sinews nor muscular tissue, nor adhering fat, except what naturally exists between the muscular fibres, and dried them in a water-bath for several days, and thus ascertained the loss which each sustained by desiccation :— FIRST EXPERIMENT. SECOND EXPERIMENT. Solid matter. Water. Solid matter. Water. POTS scssssseesccsevsvcvevsonseases 29°45 seven (0°DS caravenns 30°25 cecsveeee 69°75 f seca 2770 » 72°30 a 04. j cove 26°55 73°45 26°35 « 73-65 + 26°00 ..scccees 74:00 According to these numbers, we should arrange the meats in the following order of their relative nutritive powers: pork, beef, mutton, chicken, veal. This order is, however, not_ the true one; because the leanest meat contains a certain amount of fat; and because this substance is not so important an article of food as the pure muscles, it is necessary to ascer- tain how much a, certain quantity of meat contains before we can judge properly of its rela- tive nutritive value. M. Marchal accordingly treated the dried flesh with ether to dissolve out the fat, and obtained the following results :— Fat soluble Pure muscle in ether. insoluble in ether. Beef ...... piivasina teem’: DBL srcacnxemes U5 aie Dt ~ 24:87 24°27 23:38 22°67 The last table shows that the true order should be beef, chicken, pork, mutton, and veal; a result which experience confirms. It may, however, be remarked, that there is consider- able difference between the same kind of meat derived from different animals, and that the same amount of two different kinds of beef-broth, both containing the same amount of water, may have different nutritive values.—Comptes Rendus de !’ Académie. Liebig on the Improved Manufacture of Bread. Ir is known that the vegetable gluten of the various kinds of grain undergoes a change when moist; in a fresh condition it is soft, elastic, and insoluble in water, but in contact with water it loses these properties. If kept a few days under water, its volume is gradually in- creased until it dissolves, forming a thick mucilaginous fluid, which will no longer form a dough with starch. The ability of flour to form a dough is essentially lessened by the property of vegetable gluten to hold water, and its change to the state, for example, in which it is con- tained in animal tissues, in meat and in coagulated white of egg, in which the absorbed water does not moisten dry bodies. The gluten of grain, in flour not recently ground, undergoes a change similar to that which it suffers when in a wet state, for the flour absorbs moisture from the air, being in a very high degree a water-absorbing substance; gradually the property of the flour of forming dough is lessened, and the quality of the bread made there- 200 THE YEAR-BOOK OF AGRICULTURE. from injured. It is only by artificial drying and keeping from the air that this deterioration is prevented. In rye flour, this change occurs as soon, perhaps sooner, than in wheat flour. About twenty-four years ago, the Belgian bakers commenced the use of a remedy by means of which bread equal to that made from the freshest, best flour, was manufactured from flour which, by itself, would give only damp, heavy bread. This remedy consisted of an addition of alum, or of sulphate of copper, to the flour. The effect of both these substances in the preparation of bread rests upon the fact that when warm they form a chemical combination with the gluten, (previously made soluble in water, and changed thereby,) which restores to:it all its lost properties; it is again insoluble, and capable of holding water. The relations of: vegetable gluten to caseine, with which it has so many properties in common, induced me to make some experiments, whose object was to replace both of the substances (sulphate of cop- per and alum) so deleterious to health and to the nutritious properties of bread, by some substance having the same effect, (as regards the gluten,) but devoid of injurious qualities. This substance is pure cold-saturated lime-water. If the lime-water be mixed with the flour intended for dough, and then the yeast or leaven added thereto, fermentation progresses in the same manner as in the absence of lime-water. If at proper time more flour be added to the ‘tyisen” or fermented dough, and the whole formed into loaves, and baked as usual, a sweet, beautiful, fine-grained, elastic bread is obtained, of exquisite taste, which is preferred by all who have eaten it any length of time to any other. The proportion of flour to lime-water is as follows:—for 100 pounds of flour, take 26 to 27 pounds or pints of lime-water. This quantity of lime-water does not suffice for mixing the bread, and of course common water must be added, as much as is requisite. As the sour taste of bread is lost, much more salt may he used to give it a palatable quality. As to the amount of lime in the bread, 1 pound of ime § is d auiiteient for 600 pounds of lime-water. In bread prepared as above there is nearly the same amount of lime as is fonnd in an equal weight of leguminous seeds, (peas and beans.) It may yet be established as a physiological truth, by investigation and experiment, that the flour of the cereal grain is wanting in the property of complete nutrition; and from what we know thereof, the cause would seem to lie in its deficiency in the lime necessary for the formation of the bones. The. cereal grains contain phosphoric acid in abundance, but they contain far less lime than the leguminoug seeds. This fact may explain many of the phenomena of diseases observed among children in the country or in prisons, if the food consists principally of bread; and in this connection the use of lime-water by physicians merits attention. The amount of bread pro- duced from a given quantity of flour is probably increased in’ consequence of an increased water-compound. From 19 pounds of flour, without lime-water, seldom more than 244 pounds of bread were obtained in my house; the same quantity of flour, baked with 5 pounds of lime-water, gave 26 pounds 6 ounces to 26 pounds 10 ounces of good, well-baked bread. Now, since, according to Heeren’s determinations, the same quantity of flour gives only 25 pounds 13 ounces, the increase of weight, in consequence of the use of lime-water, appears to me indubitable. The Preservation of Cheese. Tue following article on the preservation of cheese is translated from the Maison Rustique, . Paris, for the Working Farmer, by H. 8. Olcott, Esq. :— ‘ The preservation of cheeses is a most important point to those engaged in their manufacture, especially when they are intended for export. Their consistence and their state of fermenta- tion more or less advanced in the storehouses or cheese-rooms should serve as a guide. The method of manufacture also affects largely their preservation. Those cheeses which have received pressure in a too fresh state, and from which the whey is not entirely separated, are liable to rise, and have in their centres holes or reservoirs of air, which give to the paste a spongy and disagreeable look. When this accident arises during the manufactyre, and if the fermentation is considerable, place the cheese in a cool and dry place, and pierce it with skewers of iron in the places where it rises the most; the air or the. gases escape by these openings, the cheese subsides, and the interior presents fewer cavities. To prevent this AGRICULTURAL CHEMISTRY AND GEOLOGY. 201 accident, the English make use of a powder, which is sold under the name of cheese-powder; it is composed of a pound of nitre and one ounce of powdered Armenian bole intimately mixed. Before salting the cheese, and while it is about being placed in the press, they rub it with an ounce of this mixture; a stronger dose would produce a bad effect. The part that the salt plays is very important. We know, indeed, that the caseine in the dry state exists in an indefinite condition; but then it possesses only a weak flavor, and not agree- able. The addition of the salt on the one hand, and the preparation or perfection in the storehouse on the other—operations which require the greatest care and vigilance—succeed in procuring a gentle fermentation, or a gradual reaction between the elementary substances of the cheese. This reaction proceeds so much the more rapidly as the cheese is softer and as the place is warmer and more moist. In proportion as the fermentation has been gentle, so much the more ig the flavor of the cheese sweet and agreeable. It is at this precise moment, when the reaction between the elements has produced combinations agreeable to the taste, that it is necessary to perfect the cheese: sooner than this it is not finished; later, itis in a state of decomposition more or less advanced. When the cheese is in the right condition, itis put in a place cool and not too moist, in a good cellar which does not contain any liquor in fermentation; those where wine will keep well are equally good for cheese, but the two together in the same cellar will mutually exercise a bad influence. Some cheeses with soft and fine paste are put in boxes of fir or beech. By closing these boxes tightly, and giving them a coat or two of paint, the cheeses will be preserved for a longer time and in a better condition. Chaptal and others claim that cheese after transporta- tion is never so good as when it is just taken from the cellars. The fact is, it decomposes during its transportation, and it is for this reason that in a tight varnished box the cheese will retain those qualities which constitute its excellence. The cheeses of Holland are usually covered with a coating of linseed-oil varnish: this preparation is doubtless one of the principal causes of their preservation on long voyages; their small bulk may also be adduced as a reason. The insects which attack cheeses are—1. The fleshworm or cheese-mite, (acarus siro,) which devours them when partly dried. These animals are so much the more dangerous, because they hatch beneath the crust, whence they spread throughout the interior, causing great injury. When one is careful to brush the cheeses frequently, to wipe them with a cloth, to wash with boiling water the shelves on which they lie, one can protect himself against these mites. But the most certain way is, after having rubbed the cheeses with w brine, to let them dry, and smear them over with sweet oil. It is in this way that they treat Gruyere cheese when it is attacked by this destructive insect. 2. The larve of the gilded green fly, (museca cesar,) of the common fly, (museca domestica, ) and above all of the fly of putrefaction, (musca putris.) These larvee introduce themselves into the cheese and make ravages. The presence of these vermicular insects, which denotes an advanced state’of putrefaction, excites much repugnance with the great number of con- sumers; some persons, on the contrary, prefer the cheese in this state, because it is then stronger and of amore pungent flavor. We can destroy all these animals by vinegar, the vapor of burning sulphur, or by washes of chloride of lime. When the storehouse contains these insects in abundance, take up the cheeses, and scrape and wash the shelves with water holding in solution chloride of lime; then scrub at the same time the floor, and apply to the walls a coating of whitewash. When the cheese-room is dry, replace the cheeses, which have been previously washed with a weak solu- tion of chloride of lime, dried, wiped with a cloth or scraped, if they need it, and finally rubbed, as has been said, with a cloth soaked in oil. If the cheeses have arrived at an advanced state of decomposition, they are put in powdered charcoal, mixed with a small quantity of chloride ‘of soda, which destroys their offensive odor, and haste must be made to finish their manufacture before they become entirely putrid. As to mould, this can be prevented by scraping the cheese, by brushing it, and by rubbing it with the oil. To give to new Gloucester cheese the taste and appearance of old cheese, with a probe we take from the two sides and centre—penetrating as far as the middle in each case—cylinders 202 THE YEAR-BOOK OF AGRICULTURE. of the paste, which are replaced by similar ones from an old and fine cheese. After keeping the cheeses thus prepared for a few days, they will have acquired all the agreeable qualities of old Gloucester. Preserving Timber. Ayto1ne Lz Gross, of Paris, has recently obtained a patent, the object of which is to pre- serve all kinds of timber by a cheap chemical solution, which does not injure its fibre. For this purpose he employs a solution of hydrochlorate of manganese, saturated with chalk and the oxide of zinc. The logs or pieces of timber are steeped in this solution about twenty-four hours. The vessel to hold the timber is placed vertically, so that the timber can be placed on end to allow the liquid to flow through the pores by capillary attraction. If placed hori- zontally, the liquid will not flow through the fibres of the timber. Some creosote may be added to the liquid, and with a good effect. On the Preservation of Vegetables. Tue following extracts on the preservation of vegetables are taken from the work of a French author, M. Appert, entitled ‘The Art of Preserving all kinds of Animal and Vegetable Substances for several years. Published by order of the French Minister for the Interior, in the Report of the Board of Arts and Manufactures.” The author states that ‘this method is not a vain theory. It is the fruit of reflection, investigation, long attention, and numerous experiments, the results of which, for more than ten years, have been so surprising, that not- withstanding the proof acquired by repeated practice, that provenders may be preserved two, three, and six years, there are many persons who still refuse to credit the fact.” After stating the experience he has had in the cellars of champagne, in shops, manufac- tories, and warehouses of confectioners and grocers for forty-five years, he proceeds to shy— “T owe to my extensive practice, and more especially to my long perseverance, the convid- tion—1. That fire has the peculiar property not only of changing the combination of the coti- stituent parts of vegetable and animal productions, but also of retarding, for many years at least, if not of destroying, that natural tendency of those same productions to decomposition. “2, That the application of fire in a manner variously adapted to various substances, after having, with the utmost care, and as completely as possible, deprived them of all contact with the air, effects a perfect preservation of those same productions with all their natural qualities. ; “The details of the process consist principally—1. In closing in bottles-the substances to be preserved; 2. In corking the bottles with the utmost care, for it is chiefly on the corking that the success of the process depends; 38. In submitting these enclosed substances to the action of boiling water in a Water-bath for a greater or less length of time, according to their nature, and in the manner pointed out with respect to each several kind of substance; 4. In withdrawing the bottles from the water-bath at the period described.” As an example of his practice, we give his method of preserving dwarf kidney-beans:—‘‘I cause the beans to be gathered as for ordinary use. I string them and put them in bottles, taking care to shake them on the stool, to fill the vacancies in the bottles. J then cork the bottles and put them in the water-bath, which is to boil an hour and a half. When the beans are rather large, I cut them Jengthways into two or three pieces, and then they do not require being in the water-bath longer than one hour.” When they are to be used, he gives the following instruc- tions :—‘‘Scald the French beans as if they were fresh, in water, with a little salt, when not sufficiently dressed by the preserving process. This often happens to them as well as to artichokes, asparagus, and cauliflowers. If sufficiently boiled, on being taken out of the bottles I have only to wash them in hot water in order to prepare them afterwards for vege table or meat soup.” This author furnishes several recipes for other vegetables, all of which are on the bottling principle; but there is another process, which consists in evaporating the watery parts of vegetables, and preserving them dry, We recollect some years ago receiving from Holland a few packages of sugar-peas, kidney-beans, and other vegetables, in this dried state, which, when cooked,’ were as well flavored as they, would have been in the green state. AGRICULTURAL CHEMISTRY AND GEOLOGY. 208 These we believe are obtained by drying in chambers, through which currents of heated air were introduced: they were completely dried and shrivelled up, and had the appearance of - strips of thick parchment or leather until they were boiled, and then they swelled out to their usual dimensions. We have also seen kidney-beans preserved by first boiling them tender, and afterwards drying them in a warm, airy place, when they may be kept for any length of time in bags or boxes, till ready for use. This drying process may be applied to peas, beans, kidney-beans, cabbages, cauliflowers, spinach, beets, parsnips, carrots, potatoes, &c., the latter being cut in slices. There is no subject in domestic economy of which go little is known generally as the preservation of vegetables and vegetable cookery. We know, for in- stance, that some potatoes require steaming, and others boiling, to have them in perfection; some require to be boiled in their skins, and some without; and we are informed by M. Soyer, that the soil in which the varieties of potatoes are cultivated has a great deal to do with the mode in which they ought to be cooked.— London Glentleman’s Companion. On the Results of Experiments on the Preservation of Fresh Meat. Tus inquiry, presented to the British Association by Mr. G. Hamilton, was undertaken with a view of discovering a method by which beef could be brought in a fresh state from South America. The experiments were made by enclosing pieces of beef in bottles contain- ing one, or a mixture of two or more, of the following gases :—Chlorine, hydrogen, nitrogen, ammonia, carbonic acid, carbonic oxide, and binoxide of nitrogen. Of these the last two only possessed the power of retarding putrefaction. Beef that had been in contact with car- bonic oxide for the space of three weeks was found to be perfectly fresh, and of a fine red color. Binoxide of nitrogen is capable of preserving beef from putrefaction for at least five months, during which time the beef retains its natural color and consistence. When meat that had been preserved by the last process was cooked by roasting, it was found to possess a disagreeable flavor. If cooked by boiling, the ebullition must be continued for a much greater length of time than is necessary for fresh meat. Dr. Calvert remarked, that he had opportunities of observing the well-known valuable anti- putrid properties of carbonic acid, and instanced the case of the carcass of a horse that was at present in a fresh state, although four years had elapsed since it had been soaked in liquor containing the acid. He recommended the use of this acid for preserving bodies intended for dissection, as it neither affects the tissues nor discolors the organs. New French Method of Preserving Meat and Fruit.—The French have been experimenting upon this subject, and it is reported that a mode of preserving meat and fruit ha’ been dis-' covered by which they are not altered in size or appearance, so that at the end of six or eight months, when placed on the table, they would be taken: to be perfectly fresh. MM. Delabarre and Bonnet have submitted to the French Minister of War some samples of meat preserved by their method. This consists in drying it by natural means, and then preparing it with materials furnished by the animal. When the water which composes a large part of fresh meat is driven off; the osmazome supplied by the animal is applied as a varnish, to the increase of the nutritious properties of the meat. By desiccation the meat is reduced in size and weight one-half, and this is done without the application of artificial heat. It may be eaten in this state, and is not disagreeable. When cooked, half an hour’s immersion in hot water is sufficient to increase its bulk to what it was originally, and to render it as pala- table is if fresh meat had been cooked.—Practical Mechanics’ Magazine. In addition to the above, a kindred process has been devised by a Hungarian for preserv- ing the potato, which, valuable as it is, especially in view of its cheapness, is nevertheless rendered far less widely available than it should be, by reason of its bulk and its perishable nature. But both these qualities are due to the great proportion of water it contains—about seven-eighths of its entire weight. The Hungarian’s process divests the potatoes of their water, and reduces them to a dry powder like Indian meal, which may be cheaply transported any distance, and will Heep in any climate; a ton of potatoes being reduced to less than three hundredsweight of the potato meal, which can at once be restored to the state of mashed potatoes, by simply boiling in fresh water. 204 THE YEAR-BOOK OF AGRICULTURE. On the Influence of Water in Cooking Vegetables. Mr.-8. W. Jonnson communicates to the New York, Country Gentleman the following recent memoranda of Professor Boethger, of Frankfort, “On the influence of water in cooking vegetables” :— “If one portion of vegetables be boiled in pure (distilled or rain) water, and another in water to which a little salt has been added, a decided difference is perceptible in the. taste and odor, and especially in the tenderness of the two portions. Vegetables boiled in pure water are vastly inferior in flavor. This inferiority may go so far, in case of onions, that they are almost entirely destitute of. odor or taste, though,.when cooked in salted water, they possess, in addition to the pleasant salt taste, a peculiar, sweetness and a strong aroma. They also contain more soluble matter than when cooked in pure water. Water which con- tains 1-420th of its weight of common salt is far better for cooking vegetables than pure water, because the salt hinders the solution and evaporation of the soluble and flavoring principles of the vegetables. This explains the advantage of the general use of salt in cook- ing, and the impossibility of correcting, by subsequent additions of salt, the want of flavor in vegetables that have been boiled without it.”. Use of Coffee among the Natives of Sumatra. A coRRESPONDENT of Hooker's Journal of Botany gives the following account of the man- ner of using coffee among the natives of Sumatra; he says:— In going up the river Chenaku, I saw everywhere coffee planted about the houses, and in every case the fruit dropping and decaying on the ground. Upon inquiring, I found these people drank an infusion of the. leaves and entirely. neglected the berries. I was anxious to taste this and see it prepared, and had an opportunity of doing so. A number of young twigs of the plant were gathered, with their leaves, and, after being cut to about a foot in length, were placed closely together between two strips of bamboo, tied at the ends, so as to form a dense dise of green leaves about eighteen or twenty inches in diameter. This was then held over a clear, blazing fire (the ends of the bamboo serving for a handle) until the leaves were of a rich, brownish-green color, and perfectly crisp and brittle. The latter part of this process requires some care, as, when nearly dry, the leaves are almost as inflammable as gunpowder, and if once they catch the flame the whole is.consumed.in a mo- ment. When dry, the leaves are pounded by crushing in the hand. The powder of the leaves is infused in boiling water, exactly like tea, though in much larger quantities ; it pro- duces a dark-brown liquid, looking like coffee, smelling like green tea, and tasting. like a mixture of the two. It is very pleasant, however, and refreshing, and I can understand how these people are passionately fond of it. The curious part of it is, that, while theine, caf- feine, and theobromine have been found (nearly identical as they are in composition and pro- perties) in use in three distinct parts of the world, and valued for the same exhilarating qualities, here is a people, little raised above savages, using in an independent manner one of' these very plants, being evidently uninstructed, as otherwise they would have used the berry. Chinese Method of Scenting Tea. A Cuina correspondent of the London Atheneum furnishes the following information re- specting the methods of scenting tea, as practised by the Chinese. He says: ‘‘I have been making inquiries for some time past about-the curious process of scenting teas for the foreign markets; but the answers I received to my questions were so unsatisfactory, that I gave up all hopes of understanding the business until I had an opportunity of seeing and judging for myself. During a late visit to Canton, I was informed that'the process might be seen in ope- ration in a tea-factory on the island of Honan; and accordingly embraced an opportunity to visit the place with an eminent Chinese merchant. When we entered the tea-factory, a strange scene was presented to our view. The place was crowded with women and children, all busily engaged in picking the stalks and yellow or brown leaves out of the black tea. For AGRICULTURAL CHEMISTRY AND GEOLOGY. 205 this labor each was paid at the rate of six cash a catty, and earned, on an average, about sixty cash a day—a sum equal to-about threepence of our money. Men were employed giving out the tea in its rough state, and in receiving it again when picked. With each por- tion of tea a wooden ticket was also given, which ticket had to be returned slong with the tea. Besides the men who were thus employed, there were many others busily at work, passing the tea through various-sized sieves, in order to get out the caper, and to separate the various kinds. This was also partly done by a winnowing machine, similar in construc- tion to. that used by farmers in England. Having taken a passing glance at all these objects on entering the building, I next directed my attention to the scenting process, which had been the main object of my visit, and which I shall now endeavor to describe. “In a corner of the building, there lay a large heap of orange-flowers, which filled the air with the most delicious perfume. A man was engaged in sifting them, to get out the sta- mens and other smaller portions of the flower. This process was necessary, in order that the flowers might be readily sifted out of the tea after the scenting had been accomplished. The orange-flowers being fully expanded, the large petals were easily separated from the sta- mens and smaller ones. In.100 ‘parts, 70 per cent. were used and 30 thrown away. When the orange is used, its flowers must be fully expanded, in order to bring out the scent; but flowers of jasmine may be used in the bud, as they will expand and emit their fragrance during the time they are mixed with the tea. When the flowers had been sifted over in the manner described, they were ready for use. In the mean time, the tea to be scented had been carefully manipulated, and appeared perfectly dried and finished. At this stage of the process, it is worthy of observing that, while the tea was perfectly dry, the orange-flowers were just as they had' been gathered from the trees. Large quantities of the tea were now mixed up with the flowers, in the proportion of forty pounds of flowers to one hundred pounds of tea. This dry tea and the undried flowers were allowed to lie mixed together for the space of twenty-four hours. ‘At the end of this time, the flowers were sifted out of the tea, and by the repeated sifting and winnowing processes which the tea had afterwards to undergo, they were nearly all got rid of. Sometimes a few stray ones are left in the tea, and may be detected even after it arrives in England. A small portion of tea adheres to the moist flowers when they are sifted out, and this is generally given away to the poor, who pick it out with the hand. «« The flowers at this part of the process had impregnated the tea-leaves with a large por- tion of their peculiar. odors, but they had also left behind them a certain portion of moisture, which it was necessary to expel. This was done. by placing the tea once more over slow chareoal fires in baskets and sieves prepared for the purpose of drying. The scent communi- cated by the powers is very slight for some time, but, like the fragrance peculiar to the tea- leaf itself, comes out after being packed for a week or two. Sometimes this scenting process is repeated when the odor is not considered sufficiently strong; and the head man in the fac- tory informed me he sometimes scented twice with orange-flowers, and once with the ‘Mo-le,’ (Jasminum sambac.) ' .¢¢ The flowers of various plants are used in scenting by the Chinese, some of which are considered better than others, and some can be had at seasons when others are not procura- ble. The different flowers are not all used in the same proportions. Thus of orange-flowers there are forty pounds to one hundred pounds of tea; and of the aglaia there are one hundred pounds to one hundred pounds. The quantity of flowers used seemed to me very large, and I made particular inquiries as to whether the teas that are scented were mixed up with large quantities of unscented kinds. The Chinese unhesitatingly affirmed that such was not the case; but I have some doubton this point. The length of time which teas thus scented re- tain their flavor is most remarkable. It varies however, with the different sorts. Teas scented with orange-blossoms will keep well for two or three years. Other flower-perfumes, it is said, may be retained as long as six years. On the Use of the Red Camomile (Pyrethrum roseum). for the Destruction of Insects. For some years a vague report has reached us of a Caucasian plant having astonishing and eminently useful properties—that of destroying fleas and bugs; it was also known that 206 THE YEAR-BOOK OF AGRICULTURE. this marvellous plant belonged to the genus Pyrethrum, but the specific character was uncer- tain. This plant has been recently introduced into Brussels in the rich collections of the botanical garden. We hope that in some years the red camomile shall have freed our people from one of the most abominable plagues which afflict sensitive humanity. Some details of a plant of so certain a future as that of the red camomile will be, without doubt, acceptable to our readers. In Transcaucasia, its country, this plant bears also the name of the Persian Camomile, the flea-killer, and flea-wort; it forms a little shrub with perennial roots, branched twelve to fifteen inches high, bearing many flowers at first of a deep red, after- wards a clear or rosy red, and an inch and a half in diameter, (the size of the flowers will ‘also cause this plant to be cultivated as an ornament in our gardens;) the stalks dry up after the ripening of the seeds, but the roots are perennial, and for some years may be mul- tiplied by division. Freshly gathered, the flowers are not very odorous, but dried they acquire an odor so strong and penetrating that it kills all the insects and all the vermin, of which until now no certain agent of destruction has been found. The red camomile can bear 20° Centigrade of frost, a temperature to which it is often submitted on the Caucasian mountains and on the plains, elevated from 4500 to 6500 feet above the sea level. Although it inhabits virgin soil, it is easily brought into cultivation in gardens, and, since its ener- getic properties have been recognised, it is cultivated in a large way in different parts of Southern Russia. Qne very remarkable fact is, that the knowledge of the secret of the manufacture of the red camomile powder for the destruction of fleas, &c. only dates, even in Caucasia, back about ten years, while the employment of this strong powder was known in regions far distant from Circassia. It seems that an Armenian merchant, named Sumbi- toff, travelling in the south of Asia, observed that the inhabitants-sprinkled themselves with a powder to prevent the stings of insects. This powder was nothing else than that made of the flowers of the red camomile. Returned to his country, our Armenian told his son of, the discovery, and taught him to recognise the plant. This son became poor by reverses of fortune, but bethought himself of his father’s secret; he set himself then to make this powder, and retired with very large profits from this trade. In 1818, he sold a pood (about twenty kilogrammes) of camomile powder at twenty-five roubles, (near one hundred francs;) and although the secret had been published, and every one knew the preparation of this powder, more than twenty villages in the district of Alexandropol were actually given up to the cultivation of the red camomile. The flowering of the Pyrethrum rosewm commences in June, and continues more than a month. The flowers are gathered in dry weather. In one day a good harvester can collect from thirty to eighty pounds of these wild flowers. They generally dry them in the sun; but it is remarked that those dried in the shade have more virtue. The bed of flowers is stirred from time to time to help the drying; three or four days is sufficient to drive off every trace of moisture. To obtain one pound of dried flowers it requires about one hundred pounds of fresh ones! They are then reduced to a eoarse powder with the hand, and by means of a little millstone, or a little brass mill, a very fine powder fit for use is obtained. We see by this that the process is very simple; the most difficult question is how to operate upon a sufficiently large number of flowering plants. To give an idea of the importance of the manufacture of this powder, we must state that in Transcaucasia alone there are made each year for consumption in the Russian Empire more than 40,000 kilogrammes. Baron Folkersahm has recently published a valuable paper on the cultivation of the red camomile. His memoir terminates with the following remarks: That this powder preserves you from fleas and bugs; it,kills flies, gnats, maggots, lice, and even the worms which are produced in the wounds of our domestic animals. To kill insects provided with wings, they mix a little of this with a substance which will attract them; for instance, to destroy flies, it is mixed with sugar. M. Folkersahm desires that the effects of this powder should be tried on other insects and worms hurtful to man or to his horticultural plantations. He adds, that if experiments demonstrate the efficacy of this powder, each person could cultivate in the corner of his garden a certain number of plants of red camo- mile to kill the insects, caterpillars, &. which ravage his field. From an approximative calculation, it is found that a space of eighteen square versts furnishes a quintal of powder. Mr. B. Roezl, who lived a long time in Russia, states that the Insecten pulver (powder of the AGRICULTURAL CHEMISTRY AND GEOLOGY. 207 Pyrethrum) is imported every year from Persia and the Caucasian provinces into all parts of the Russian Empire; and that used fresh, sprinkled over the window-sills, it makes all the flies fall instantly, asphyxiating them; but that at the end of a year it loses its energy. He also states that it is the Pyrethrum carneum and roseum which produce this powder. Journal @ Horticulture de Belgique. Alcohol from the Tubercles of the Asphodelus ramosus. Tue tubercles of Asphodelus ramosus have been employed for some years in Algeria for the manufacture of alcohol. It has been asserted that they contain neither starch nor sugar, and the experiments of M. Clerget fully confirm this opinion, When grated and pressed, they yield 81 per cent. of juice, of specific gravity 1-082. ' When treated with iodine, not the slightest indication of starch can be obtained. The juice has no action on polarized light, but if it be heated with hydrochloric acid at the boiling temperature, it rotates the plane of polarization to the left very powerfully. When mixed with two per cent. of yeast, it enters rapidly into fermentation, and yields eight per cent. of alcohol, being about twice as much as can be obtained from the juice of sugar-beet. The dried tubercles of the plant do not yield more than three per cent. of alcohol. M. Clerget is engaged in the investigation of the principle which undergoes fermentation. Odors of Flowers. Scuusier and Kéhler have made many interesting observations on odors as well as colors. They found that, of the various colors of flowers, some are more commonly odoriferous than others, and that some colors are more commonly agreeable than others. Color. No. of species. Odoriferous. Agreeable. Disagreeable. White wiscsccessee, cesrnccsesvsesccceceess LLGS sesseoeee 187. Yellow OO vesvne TR unr Red ... 923 ... 85 .. Blue... 594 wu. 381 .. Violet . oe: SOT ancy 28 x Green..... wow. 153. «TD ) cen Orange aw «502, . 3B. Brow sicccvscsscacnsccascecsceveassescssee LB secceaeee dL. Neeewvnee The white most odoriferous and agreeable—the yellow and brown most disagreeable.— Proft Darby. On the Aroma of American Wines. At a recent meeting of the American Wine-Growers’ Association at Cincinnati, the fol- lowing was read from N. W. Thatcher, of Chillicothe :— * * * * “The great desideratum in wine-growing is, doubtless, to procure a grape possessing at once sugar in abundance and an agreeable aroma; probably the Catawba (there are some spurious varieties of this grape) possesses these qualities to a more profitable degree than any grape we now cultivate, inasmuch as it is perfectly hardy; but this grape should not be regarded as the type of American grapes, for we shall yet surpass it; and to those whose palates do not accord too much with the foxy aroma of the Catawba, the Herbemont is the most acceptable grape, but the latter is not sufficiently hardy for exten- sive and profitable cultivation; but as we have several varieties of that class of grapes, we may look for the production of seedlings from them that will surpass any of the Fox family. Doubtless a cross of the Herbemont and Catawba would produce a valuable grape as to flavor and juiciness. It is, doubtless, a-desideratum to obtain a grape possessing all the requisites for good wine; that is, it should be productive, hardy, juicy, sweet, and well-flavored. Until we can get one grape possessing in a sufficient degree all these, we can cultivate several varieties and attain our object by mixing the berries in the mash-tub. This is desirable, at least, to afford variety in our wines, as well as to give flavor to strong-bodied wines which are without it. The taste of the juice of the grape, as well as for various kinds of food, becomes fixed to some particular sorts by custom, and finally to the exclusion of any thing 208 THE YEAR-BOOK OF AGRICULTURE. new; and hence I infer it will be difficult, after a few years, to eradicate the predilection of Ohio wine growers, even for the foxy aroma of their Catawba wines. If we look forward to the exportation of wines to foreign countries, we must look for their production in grapes of the Herbemont type. Iam a wine-grower to a very limited extent, and only as an amateur; but still my experiments are, so far as they are successful, as valuable in their results as if I crushed the grapes of a township. I shall make no wine this season. I am satisfied that we can make, as good. wines -in-this country as in anyother, and at equal price. I would prefer the best Cincinnati wine to any foreign I have ever seen, except, perhaps, the pure Xeres, Sherry, and Mangannelta, which we rarely see.’”’ New Use for Buckwheat Straw. Ir has been recently stated that the straw of the buckwheat has been applied with suceess in Russia as a substitute for quercitron, or yellow-oak bark, in dyeing. The Effect of Colored Light on Germination. To determine the commercial value of any seeds, one hundred of them are placed in a pot in a stove, made for the purpose of quickening the process of germination. If all the seeds germinate, the seed obtains the highest value in the market. If only eighty germinate, the seed loses 20 per cent. in value. This process ordinarily occupies from twelve to fifteen days; but Mr. Lawson found that by using blue glass they are enabled to determine the value of seed in two or three days: and this is a matter of such commercial importance to them, that it is quite equal to a gift of £500 a year.—Proceedings of the Royal Polytechnic Society. « Plants Under Different Conditions, Dr. Guapstonz, F.R.S., has communicated to the London Chemist some interesting facts in relation to certain experiments made by him upon pee under different. colored glass, and under different atmospheric conditions :— Darkness promotes a rapid and.abundant growth of thin rootlets; it prevents the formation of chlorophylle, but doesnot interfere much with the general healthiness of the plant, nor with the production of the coloring matter of the flowers. Partial obscurity produces the same effects in a modified manner, but greatly facilitates the absorption of water; and the cutting off of the chemical or blue ray under such circumstances seems to make very little difference. The withdrawal of all but the caloric rays interferes with the length of the roots, and produces a badly-developed plant. The pure luminous ray causes the rootlets to be few and straggling, and diminishes the absorption of water. Hyacinths were well developed under the pure chemical influence. Experiments were made on the germination, under like influences, of wheat and peas, as samples of the two great orders of plants. The first series was made in common air, the plants being placed on damp bricks, twelve seeds of each kind being employed in each separate instance. The periods of germination, and all.the circumstances that marked the growth of the plants, were carefully noted; drawings were made, and at the close of the experiment the height of the plants, the length of their roots, their weight, and the number of seeds that had germinated, were recorded. The effect of the same solar radiations on the two plants was extremely different. In respect to the wheat, it was found that, under the given circumstances, the absence of the chemical rays favors the first growth, and the pre- sence of the luminous rays does not impede it. Afterwards the opposite effect takes place; the roots are retarded in their development by the yellow ray much more than by all the rays of the spectrum in combination. The calorific ray is, on the whole, the most favorable to their growth—even more so than the complete absence of all solar radiations. The shoot- ing forth of the plume is favored also by the withdrawal of the chemical rays, especially just at first; but the full and healthy development of leaves requires all the rays of the spectrum, the luminous being particularly necessary. In respect to peas under the givén circum- AGRICULTURAL CHEMISTRY AND GEOLOGY. 209 stances, it was found that the cutting off of the chemical rays favors the first germination of the seed; and this appears to be the principal, if not the only,. advantage of the darkness obtained by burying the seeds in the soil. The ‘development of roots requires also the absence of the chemical ray, but is rather favored than otherwise by heat and luminosity. The first development of the plumule also proceeds best under the same circumstances. Yet these are not the conditions which produce a healthy plant; they cause too rapid and succulent a growth. When the plant is fairly established, those radiations which are, comparatively speaking, devoid of light, but replete with chemical power, seem the most suited to it. The points in common between the differ- ent actions of the solar radiations on wheat and on peas are, that in both cases the cutting off of the chemical ray facilitates the process of early germination; and that both in reference to the protrusion of the radicles and the evolution of the plume, obscurity causes an unna- turally tall growth and poor development of leaves, and the yéllow ray exerts a repellant influence upon the roots, giving the wheat a downward and the pea-roots a lateral impulse. A comparison of the results obtained by means of the yellow, of the obscured colorless, and the obscured yellow glasses, showed that the yellow ray has a specific action in many respects, but not of the character which has sometimes been ascribed to it. The diversity of effect of the same ray upon the two plants was well exhibited by what took place under the colorless and red glasses. Under the former there grew a tall and vigorous crop of wheat-plants, with a@ mere matting of stunted roots from the peas, while under the latter a thick crop of green and spreading plants arose from the germinating peas, but the wheat were few and straggling, and unhealthy in appearance. Seeds of the wheat and the pea were placed in jars, con- taining respectively carbonic acid gas, hydrogen from which every trace of oxygen was removed by pyrogallate of potash, common air from which carbonic acid was removed by caustic alkali, and normal atmospheric air. These merely corroborated the opinion generally entertained, that oxygen is absolutely requisite for instituting the first change in the coty- ledons of the seed. Peas and wheat were also grown in oxygen gas, under the colorless and colored bell-jars. They grew and appeared to flourish best under the chemical influences of the blue glass. The Grittiness of Pears. Tus grittiness of pears greatly diminishes their value as a dessert. The proximate cause is known to be the deposit of hard matter in the pulpy cells, analagous to that which gives the bony texture to the stone of plums, cherries, &. In stone fruits the gritey matter is collected, and forms the pit or stone; but in the pear there is no part exclusively appropriated for the grit, which is found sometimes in large or small masses throughout the pulp. The cause of this grittiness is unknown, but the accumulation of it may be arrested or diminished by sheltering the fruit from the cold rain which may fall during its growth, and arrest the free circulation of the sap. This hypothesis was suggested by M. Delaville, a French gardener, who remarks that the sorts which are most subject to spotting and grit- tiness are those which have the finest skin. The manner in which M. Delaville protects his pears is as follows: As soon as the fruit is completely set, he encloses each cluster in a cornet of paper, fixed to the top of the stalk by a piece of rush, (bast.) This cornet must be sufficiently large to guard the fruit from all exterior injuries. The cornet should be very wide, and the small end placed upwards, so as to leave nothing uncovered except the bottom of the fruit-stalk. But this protection is unnecessary where the fruit is trained against a wall. About a fortnight before gathering, the cornet should be removed, in order to give the fruit color and to complete the ripening. At the exhibition of the Imperial Horticultural Society of Paris, some St. Germain pears were exhibited, part of which were full of spots and grittiness, while others were fine and pulpy. Both samples were from one tree, but the fine ones were protected in the manner above described.—Phi. Florist. 4 210 THE YEAR-BOOK OF AGRICULTURE. Report on the Gases Evolved in Steeping Flax, and on the Composition of the Dressed Flax Fibre. By Joun F. Hopasgs, M.D., F.C.8., Prof. of Agriculture, &c. Queen’s College, Belfast. Tus report contains the results of investigations which were undertaken in connection with the technical processes employed in the preparation of the flax-plant for textile pur- poses. The attention of the author was chiefly directed to the examination of the method of steeping in water heated by steam, introduced by Schenck, and usually termed the hot-water system. In this process, which was fully described in a report made to the British Associa- tion for the Advancement of Science, at the Belfast meeting, it was found that the chemical changes produced by the fermentation of the flax straw in water maintained at a temperature of 90° F., did not materially differ from those which accompany the ordinary method of steeping in pools in the open air; and that, in fact, Schenck’s method might be regarded as merely the common process of the Irish farmer, accelerated and subjected to scientific control ; the peculiar fermentation by which the adhesive matters of the straw are softened and dis- solved being attended in both cases by the production of a considerable amount of butyric acid. Examinations of the gaseous products of the fermentation were made at steeping-works in the neighborhood of Belfast, and also in experimental works in Queen’s College; the water contained in the experimental vats being maintained at the requisite temperature by pipes conveying steam from the boiler of an engine connected with the college heating apparatus. The gases evolved from the fermenting liquid were analyzed in accordance with the processes proposed by Bunsen, and were found to consist of carbonic acid, hydrogen, and nitrogen. No traces of carbonic oxide, carburetted hydrogen, nor of sulphuretted hydrogen were detected. The following was the corrected composition of the mixture of gases collected’in a trial of Schenck’s process, in the steeping-vats in Queen’s,College. The carbonic acid was removed by the introduction of balls of caustic potash, and the residue examined by explosion with oxygen, &c. Composition in 100 vols. Carbonic aCid....ccccecesvcesssoencccsenes seccceseccesecsenesee svesssees uvcarseceacsaesens 22°29 Fy drogen. ..sccccescccosenee seccnenss soccccees snesccons saveceoae seusasnescee vecsouasanasese 44°30 Nitrogen...... pessees ancesece peanes senseroes onenne secon senennensen oeeeeee sone veaacees coos OOAL Composition of dressed flax.—It was usually assumed, formerly, that by the process employed in the preparation of flax for spinning purposes, the fibre was deprived of all the constituents which the plant, during its growth, had extracted from the soil, and that it might be regarded as possessing the same composition as the cellulose of the chemist. This opinion was, several years ago, proved to be erroneous; and the results of the following analyses of samples of flax fibre show that not merely does the dressed flax of commerce con- tain a portion of the inorganic matters of the plant, but that there remains locked up in the cells of the fibre a considerable amount of the nitrogenized and other proximate compounds of the unsteeped straw. The following were the methods adopted in the examination of the flax fibre:—The fibre, cut into small pieces, was repeatedly treated with cold water so long as any thing dissolved. The solution obtained was strained through linen, and afterwards filtered. On boiling the filtered liquid, only a slight troubling was observed; but on the addition of a few drops of acetic acid, a precipitate of caseine was obtained, which, after twelve hours subsidence, was collected, washed, dried, and weighed. In the liquid from which the caseine was separated, when evaporated almost to a syrupy consistence, alcohol produced a bulky grayish precipitate, which was collected, washed, and dried. The alcoholic liquids, on concentration, afforded a rich orange solution, and gave, on evaporation, a reddish brown residue, which when heated, evolved a strong caramel-like odor, and its solution had a sweetish taste, and afforded the usual reactions of grape-sugar. The several precipitates, after being weighed, were carefully incinerated, and the weight of ash obtained in each case deducted. The determinations of the amount of nitrogen in the samples were made accord- ing to the method of Will, and included first, the estimation of the total amount of nitrogen in the dried flax, and secondly, of the amount which was retained in the form of insoluble AGRICULTURAL CHEMISTRY AND GEOLOGY. 211 azotized compounds, in a portion of the fibre exhausted by treatment with water. The amount of wax and oil present, was obtained by treating a portion of the fibre, dried in a peculiar apparatus at 212°, in which the substance is exposed to the vapor of ether, which, when condensed in a separate cooling apparatus, is occasionally forced through it by atmo- spheric pressure. The residue of the flax, after exhaustion with water, and the subtraction of the amount of insoluble salts which it was found to contain, and of the wax and insoluble nitrogenized bodies, as calculated from the amount of nitrogen in the washed fibre, was re- garded as cellular fibre. The following is a statement of the results obtained in the exami- nation of two samples of dressed flax, of average quality. The samples dried at 212° contained respectively, No. I. 9-10, and No. II. 8-61 per cent. of water:— No. I. No, IT. Wax, volatile oil and acid, resinous matter......scscrssccccevee 2°200 seccrrscoescees 2°620 Sugar, and coloring matters soluble in alcohol. 1541 . ve 0°624 Inorganic matters soluble in alcohol 0-281 . 0°116 Gum and pectine.......... wee 0°698 . 0°280 Salts, insoluble in alcohol. 0-076 . 0-044 Nitrogenized compounds soluble in water, 3°560 . 1:386 Nitrogenized compounds insoluble in water 2°940 4310 Inorganic matters united with the fibre. 0-238 . 1-490 Cellular fibre........ ssa vecvsususuvarcigseesasesbiete side sedyeevescay susan’ BT-974 secvvscrseccsve 89°136 The total amount of inorganic matters present in the samples was obtained by the careful incineration of the dressed flax in platinum dishes. No. I. dried at 212°, left 1-40 per cent., and No. II. 1-54 per cent. The ash of No. I. was white, while that of No. II. had a brick- red color. Each had respectively the following composition :— Ash of sample No. I. Ash of sample No. II. Potash... 1°85 Soda... es 7°63 Chloride o 80 a wa ae, 2D a0 177 Tiiasnssecneseveee sai o 29°24 ., 27-08 Magnesia pagina vaiiees » 464... . 0°70 Peroxide of iron... Phosphoric acid.. Sulphurie acid.. Carbonic acid... ie . Silica...1..scssecrersesenccsscecscoressesecsccnsevsscseseccscossces LOS sescesseecccsescvsenscovees 21°31 In addition to the above analyses of fibre prepared by the hot-water system, a sample of Courtrai flax was examined. The amount of pure fibre was obtained by repeated digestion of the dried flax in a dilute solution of potash, (one-half an ounce of caustic potash to three pints’of water;) and, after the careful removal of all traces of potash by washing in distilled water, the exhausted fibre was incinerated, and the amount of ash left deducted. The following were the results:— Courtrai flax steeped and dressed.—100 parts contained water 8-40, and, dried at 212°, gave of wax and oil 2-30 per cent., and on combustion with soda-lime afforded 1-04 per cent. of nitrogen. Treated, as described, with dilute solution of caustic potash, there remained after the subtraction of the ash obtained by the incineration of the residue, 82-56 per cent. of pure fibre. A sample of the flax dried at 212° left, when burned, 1-05 per cent of ash; if, there- fore, we may assume the amount of nitrogen present as representing the proportion of the so-called proteine compounds contained in the flax, the following statement of the compo- sition of the sample may be given:— Flax dried at 212°. Wax and oil....... ines seaeraee ise 2°30 Nitrogenized comp 8, caseine, & 6°50 Gum, sugar and eorEny matters... 759 Inorganic matters... 1-05 Pure fibre.....e000 vssvee eect eae eee Lenncoee seeeeesecoesensnesssesoncocenesses | 82556 The foregoing analyses aries show, Ries to what has been Becta asserted, that the fibre of flax in the condition in which it is purchased by the spinner, after it has been steeped and dressed, contains a considerable amount, not merely of the earthy and saline ingredients which the plant has taken from the soil, but of the various compounds, such as wax and caseine, which belong to the unsteeped straw, and upon the presence of which in the fibre it is probable much of its spinning qualities depend. An examination 212 THE YEAR-BOOK OF AGRICULTURE. of the plant, as pulled from the field in the. usual state of maturity, when the seeds contained in the capsules begin to assume a brown color, shows that it contains starch, which can be readily extracted by placing the stems, cut in pieces, in a powerful lever press, and moisten- ing them with a small quantity of water. By allowing the expressed liquid to. remain at rest, the starch subsides, and assumes a purple tinge on the addition of a watery solution of iodine. When, however, the flax straw is examined after it has remained exposed to the air for several days in the shock, the liquid obtained by subjecting it.to pressure and washing with water was found to afford no indication of the presence of starch. In the dressed flax no trace of starch could be.detected,.and, the discovery of. the existence of a considerable amount of grape-sugar is exceedingly interesting, as corroborative of the statement of expe- rienced dressers, that, by storing up the steeped flax, as imperfectly dried by exposure to the air for some weeks before proceeding to remove the adherent woody matters by scutch- ing, the separation of fibre is greatly facilitated and its qualities aii On the Deodorizing Properties of Charcoal. In a recent. communication to.the Royal. Agricultural Society, England, on the above sub- ject, by Prof. Way, he remarked, that, independently of the noxious gases’ resulting from the putrefaction of animal matter generally, and which consisted principally of sulphuretted hydrogen and sulphuret of ammonia, each particular. animal substance, excretion or other- wise, had its peculiar odor, which—although abundantly perceptible by the senses, and. in many cases, as in musk, almost inexhaustible—was inappreciable in weight; therefore, by deodorizing a large amount of. odor, it was to be inferred that a large amount of manuring matter was thereby secured.. He then enumerated the various single and double deodorizers that had been employed. He referred to Sir William Burnett’s excellent application of chloride of zine, and to the ordinary chloride of lime; to gypsum, (sulphate. of lime,) and its conversion, in ammoniacal atmosphere, into sulphate of: ammonia and carbonate of lime; to the agreeable odor of pure ammonia, and its power of giving intensity to odors of a dis- agreeable. character, which intensity was.lost when the. ammonia was.withdrawn;. to sulphate of iron, (green copperas,) which, when powdered and thrown into tanks, turned black, on account of the sulphuret of iron formed on the decomposition of the sulphuretted hydrogen present. He then proceeded to the consideration of charcoal as a deodorizer. He gave an interesting statement of the peculiar action of charcoals in general, arising, he believed, from the great amount of surface their spherical interstices presented, and of the peculiar action and superior value of animal charcoal over all others. He explained that in charcoals it was not the amount of carbon they contained that constituted their value, but the mode in which the carbon was distributed; that animal charcoal contained only 10 per cent. of real carbon, while wood charcoal contained 90 per cent. He referred to the large amount of water (50 or 60 per cent.) which peat charcoal took up, and to the fallacious dry state of the manures with which this water-carrier was mixed. He feared this mode of introducing water in a latent state into manures, in many cases, gave a turn in the scale more in favor of the manu- facturer than of the farmer. He doubted whether the peat charcoal could be used economi- cally for the purpose of soaking up tank-water; if not, he feared it would prove of no advantage, in other respects, as 4 remunerative agent to the farmer. It had been long before the public, but had not progressed in market value, os it would have done had its application been successful. _He considered it to lead to much error in practice that. the exact nature of the action of charcoal on ammonia was not better understood by the public, Fresh-burnt charcoal would absorb a large quantity of ammoniacal gas, but it was a mistake to suppose that.it would consequently, abstract ammonia from a.liquid impregnated with it; on the contrary, water had the power of displacing from charcoal the whole of the ammonia it had received in a gaseous state within its pores. Peat charcoal did not either take manure or separate it from sewage; it simply rendered manure portable. He exhibited a striking experiment, showing the power of dry peat charcoal to arrest odors. Two open tumblers were half-filled with the most offensive sewage matter Professor Way could obtain, and the surface of each mass covered with a film of thin paper, and a thin bed of powdered -peat AGRICULTURAL CHEMISTRY AND GEOLOGY. 213 charcoal resting upon it. These tumblers were inthis state handed round to the members, who ascertained the perfect manner in which the sewage matter was thus rendered no longer offensive to the smell. Dr. J. Stenhouse, of England, has recently published, in the Journal of the Society of Arts, the following interesting information respecting the properties of charcoal. He says: ‘Mr. Turnbull, a well-known chemical manufacturer of Scotland, about nine months ago, placed the bodies of two dogs in a wooden box, on 2 layer of charcoal powder a few inches in depth, and covered them over with a quantity of the same material. Though the box was quite open, and kept in his laboratory, no effluvium was ever perceptible; and on examining the bodies of the animals, at the end of six months, scarcely any thing remained of them except the bones. Mr. Turnbull sent me a portion of the charcoal: powder which had been most closely in contact with the bodies of the dogs. I submitted it for examination to one of my pupils, Mr. Turner, who found it contained comparatively little ammonia, not a trace of sul- phuretted hydrogen, but very appreciable quantities of nitric, sulphuric acids, with acid phos- phate of lime. : “Mr. Turner subsequently, about three months ago, buried two rats in about two inches . of charcoal powder, and a few days afterwards the body of a full-grown cat was similarly treated. Though the bodies of these animals are now in a highly putrid state, not the slightest odor is perceptible in the laboratory. «From this short statement of facts, the-utility of charcoal powder as a means of prevent- ing noxious effluvia from church-yards, and from dead bodies in other situations, such as on board a ship, is sufficiently evident. Covering a church-yard, to the depth of from two to three inches, with coarsely-powdered charcoal, would prevent any putrid exhalations ever finding their way into the atmosphere. Charcoal powder also greatly favors the rapid decomposition of ‘the dead bodies with which it is in contact, so that in the course of six or eight months little is left except the bones. “Tn all the modern systems of chemistry, such, for instance, as the last edition of Zurner’s Elements, charcoal is described as possessing antiseptic properties, while the very reverse is the fact. Common salt, nitre, corrosive sublimate, arsenious acid, alcohol, camphor, creosote, and most essential oils, are certainly antiseptic substances, and therefore retard the decay of animal and vegetable matters. Charcoal, on the contrary, as we have just seen, greatly facilitates the oxidation, and consequently the decomposition, of any organic substances with which it is in contact. Itis, therefore, the very opposite of an antiseptic.” Does Sea Water kill Seeds? A question which has an important bearing upon the actual or possible dispersion of many species over the. large geographical area which they are found to occupy, and therefore upon the problem whether the same organic being was created at one point, or at several, or many widely-separated points, on the face of the globe. It is commonly believed and stated that seeds—those of maritime plants excepted—will not germinate after exposure to salt water; and so general is the belief, that no one, so far as we know, has made the experiment until now, when the distinguished naturalist, Mr. Darwin, has shown that seeds of various kinds will germinate promptly after prolonged immersion in sea water. The account of his simple but well-devised experiments is given in the London GaPleners’ Chronicle for 1855, as follows :— “As T had no idea when I began, whether or not a single week’s immersion would kill all the seeds, I at first took only a few, selecting them almost by chance from the different great natural families; but I am now trying a set chosen on philosophical principles.’ The sea water has been made artificially with salt. The seeds were placed out of doors in the shade, in bot- tles holding from two to four ounces each: the mean temperature being from 44° to 48° F. Most of the seeds swelled in the water, and some of them slightly colored it, and each kind gave to it its own peculiar odor. The water which contained the cabbage and radish seeds became putrid, and smelt quite offensively; and it is surprising that seeds, as was the case with'the radish, could have resisted so contaminating an influence; and as the water became putrid before I had thought of this contingency, it was not renewed. I also placed seeds in 214 THE YEAR-BOOK OF AGRICULTURE. ® quart bottle in a tank filled with snow and water, to ascertain whether the seeds kept at the ‘temperature of 32° would better resist the salt water; this water became turbid and smelt offensively. In the following list, where the cases are specified, the seeds have endured their full time :— ‘¢ (1) Seeds of common cress (Lepidium sativum) have germinated well after forty-two days’ ‘immersion; they give out a surprising quantity of slime, so as to cohere ina mass. (2) Ra- dishes have not germinated as well after the same period. (8) Cabbage-seed: after fourteen days’ immersion only one seed out of many came up; this is rather strange, as the cabbage is a sea-side plant; in the ice-cold salt water, however, several came up after thirty days’ im- mersion. (4) Lettuce-seed grew well after forty-two days; (5) Onion-seed: but few germi- nated after the same period; (6) Carrot and (7) Celery-seed grew well after the forty-two days; (8) Borago officinalis, (9) Capsicum, (10) and Cucurbita ovifera, germinate well after twenty-eight days’ immersion; the last two, rather tender kinds, were also tried in ice-cold water, and germinated after thirty days’ immersion. (11) Savory, or Saturga, did not grow as well after twenty-eight days. (12) Linum usitatissimum: only one seed out of a mass of seeds (which gave out much slime) came up after the twenty-eight days, and the same thing hap- pened after fourteen days; and only three seeds came up after the first seven days’ immer- sion, yet the seed was very good. (13) Rhubarb, (14) Beet, (15) Orach, or Atriplex, (16) Oats, (17) Barley, (18) and Phalaris Canariensis, all germinate well after twenty-eight days; like- wise the last-named six, after thirty days in ice-cold water. (19) Beans, and (20) Furze, or Ulex: of these a few survived with difficulty fourteen days; the beans were all killed by the ‘ice-cold water in thirty days. (21) Peas germinated after seven days, but died after fourteen ‘days’ immersion out of doors, and likewise after thirty days in the ice-cold water. (22) Tri- folium incarnatum is the only plant of which every seed has been killed by seven days’ immer- sion; nor did it withstand thirty days in ice-cold salt water. (28) Kidney-beans have -been tried only in the latter water, and all were dead after thirty days. ‘¢As out of these twenty-three kinds of seed, the five Leguminose alone have as yet been killed, (except the cabbage-seed, and these have survived in the ice-cold water, ) one is tempted to infer that the seeds of this family must generally withstand salt water much worse than the seeds of the other great natural families; yet, from remarks in botanical works, I had expected that these would have survived longest. It has been curious to observe how uniform, -even to a day, the germination has been in almost every kind of seed, when taken week after week out of the salt water, and likewise when compared with the same seeds not salted—all, of course, having been grown under the same circumstances. The germination of the rhubarb and celery alone has been in 2 marked degree altered, having been accelerated. “To return to the subject of transportal: it is stated in ‘Johnston’s Physical Atlas’ that the rates of ten distinct currents in the Atlantic (excluding drift currents) are given, and their average is thirty-three nautical miles per diem; hence in forty-two days, which length of immersion seven out of the eight kinds of seed as yet tested have already stood, a seed might be readily carried between thirteen hundred and fourteen hundred miles. “