REPORT ON THE WATERS OF THE HUDSON RIVER. TOGETIIKK WITH AN ANALYSIS OF THE SAME, MADE TO THE WATER COMMISSIONERS OF THE CITY OF ALBANY. BY C F. CHA N D LER, PH.D. - JANUARY, 1885. NEW YORK: TROWS PRINTING AND BOOKBINDING CO., •JO 1-21 3 East Twelfth Street. I iss:>. II vth the compliments of C. F. CHAN DLER, SCHOOL OF MINES, Columbia College, 49th Street, cor. 4th Ayh., New York, who will be greatly obliged for copies of Water Analyses and Pamphlets on Sanitary Subjects. c Digitized by the Internet Archivi in 2013 e http://archive.org/details/reportonwatersofOOchan REPORT ON THE WATERS OF THE HUDSON 1UVEK. TOGETHER WITH AN ANALYSIS OF THE SAME, MADE TO THE WATER COMMISSIONERS OF THE CITY OF ALU ANY, BY C. F. CHANDLER, PH.D. JANUARY, 1885. NEW YORK: TROWS PRINTING AND BOOKBINDING CO., 801-218 East Twklftii BTBHBT, 1885. - ^9 ■ Aw j EE PORT. New York, January 31, 1885. To the Board of Water Commissioners of the City of Albany : Gentlemen : In accordance with your request, I have made a careful study of the water of the Hudson River a! Albany, with special reference to its present condition, and to the question whether it is still safe to rely upon it as a source of supply for the city of Albany. As you are aware, I had the honor to be called upon to investigate this subject, by the Board of Water Commission- ers in 1872, and my conclusions were embodied in the follow- ing paragraph at the end of the report which I made in that year : "The most careful examination of the water has failed to reveal anything to sight, taste, smell, or analysis, which can be considered as throwing the slightest suspicion upon the purity of the water of the Hudson, or its fitness for supply- ing a perfectly wholesome beverage for the citizens of Albany. I am further confirmed in this opinion by the careful compar- ison of the river and its surroundings with the sources of supply in other cities in this country and Europe. I have no hesitation, therefore, in recommending it as a suitable and proper source of supply." I understand you to ask me now whether anything has occurred during the past thirteen years to lead me to change my opinion as expressed in 1872 ; whether new methods of chemical analysis may not have been introduced which make 1 it possible to discover contaminations which could not be recognized by the methods formerly employed ; whether other methods of analysis, especially microscopic and culture ex- periments, may not reveal the presence of dangerous organ* isms which would escape every method of chemical analysis ; whether the knowledge of zymotic diseases has not advanced to such a degree as to compel different conclusions ; and finally, whether the test of experience in the city of Albany 4 lias not demonstrated the danger of making use of this source of water supply. I have carefully considered each of these questions and will briefly state the results. I. CHEMICAL ANALYSIS. In 1872, 1 made an analysis of a sample of the water taken from the river outside the pier opposite Quackenbusli Street, on March 14th, by the methods then in use for such analyses. The following were the results : The suspended impurities which rendered the water tur- bid, being temporary in character, were allowed to subside ; the clear water was then found to contain the following sub- stances in one United States gallon of 231 cubic inches. An analysis of the Croton water was presented at the same time for comparison. I. ANALYSIS OF THE WATER. Hudson River. Croton River. 0.361 grains. 0.402 grains. 0.157 0.076 t'i 0". 1 79 " 0.260 " Sulphate of lime 0.980 it 0.158 " 4.165 2.670 " 1.397 (( 1.913 " 0.408 (1 0.621 " 0.070 II a trace. 0.G99 C 0.670 " Total 8.313 grains. 6.873 grains. 3.35° 2.51° The above figures represented the compounds as they were believed to exist in solution in the water. It should be noticed that the Hudson River water compares very favor- ably with the Croton in purity, the total difference per gal- lon being only 1.54 grains. It was clearly recognized at that time that the mineral constituents of a water, while they might be of importance in determining the value of a water for manufacturing or culinary purposes, are not, unless present in very unusual quantities, many times the amount contained in the Hudson River water, of any Significance in discussing the fitness bt water ['or drinking purposes. It was well understood that the only constituents that could possibly produce disease were the organic constituents, — namely, those derived from sewage, — and it was we'll recognized that the method of dial in* guishing wholesome Prom unwholesome organic matter wad not very accurate?. I did not, therefore, at that time rely upon the analysis, but carefully discussed the waters of the Hudson River as compared to those of other huge rivers which had been found to be entirely satisfactory for domes- tic purposes in other parts of the world, the discussion being based upon other considerations than chemical composition, namely, the drainage area, population, flow of stream, etc. Since that time considerable progress has been made in the chemical analysis of waters, with special reference to the examination for sewage contamination. It has been found that where water has been contaminated with sewage it will exhibit, when tested by the new methods of analysis, the unchanged organic substances of the sewage, which can be recognized and estimated in quantity by distilling the water with permanganate of potash. This process converts the albuminoids of the sewage into ammonia, the amount of which can be determined with great accuracy. From this the amount of albuminoids in the water can be computed. It is further found that the sewage in the water is rapidly destroyed, and that the products of this destruction are am- monia salts, commonly spoken of as 41 free ammonia," and nitrates and nitrites. When, therefore, water has been re- cently contaminated by sewage, the amount of such contam- ination can now be determined with great accuracy by an analysis which shows the amount of free ammonia, albumi- noid ammonia, nitrites, and nitrates, and as far as determin- ing the extent to which the water is contaminated, this method is quite satisfactory. I have carefully applied it to samples of the Hudson River water, having twice visited Albany for the purpose of observ- ing the local surroundings of the river, and of procuring sam- ples. 1 have been assisted in these analyses by Dr. Elwyn Waller, the Instructor in Analytical Chemistry in the School of Mines, who has been engaged in making similar analyses of waters in other localities for the Stale Hoard of Health. L 6 also procured from a friend in Troy a sample of the water of the river taken above Lansingburg, and a sample of the water drawn from a hydrant in Troy. It will be noticed that samples were taken from the river at the inlet to the pumping station, both at high and low tide, on two different days, as well as from the Bleecker Reser- voir and Tivoli Lake The results of these analyses are presented in tabular form. Table II presents them expressed in grains per United States gallon of 231 cubic inches. Table III presents them in parts per 100,000, this being a European method of presenting such analyses. It will be noticed on inspecting the tables that two analyses have been made in several cases, as indicated by the numbers. Two demijohns of water were taken in each of those cases. The analyses marked 5c, 6c, 9c, and 10c, were made of the clear water in the demijohn after allowing the sediment to subside. The analyses marked 5s, 6s, 9s, and 10s, were made from the water of the duplicate demijohn, care being taken to first shake the demijohn in order to bring all the sediment into suspension, so that the analyses include the sediment in these four cases. The figures in the tables represent all the analyses that were made. The important columns are those which show the "chloride of sodium," the "nitrogen in ni- trates and nitrites," the "free ammonia," and the "albu- minoid ammonia," these being the figures which represent the organic matter derived from all sources. As chloride of sodium, or common salt, is a substance which is freely used in all dwellings, it naturally finds its way into the drainage, and the amount of this substance in water is found to indicate, to some extent, the variations in the quality, though it is of little use in comparing samples * of water from different localities. • To facilitate comparisons, Tables IV and V have been prepared. They exhibit the results of these analyses shown as whole numbers in ten-thousandths of a grain in one U. S. gallon of 231 cubic inches, and in parts in one thousand mil- lion. For further comparison tables of analyses of American and Foreign waters are presented. 7 INTERPRETATION OF THE RESULTS. It will be seen from a careful comparison of the analyses of the Albany and Troy waters that the water at Albany ac- tually contains a smaller quantity of albuminoids than the water above Troy, in spite of the fact that there is undoubt- edly some addition of matter to the river in its passage past Troy, while the products of the destruction of organic matter, that is, free ammonia and nitrates and nitrites, have increased. This is entirely in keeping with the theory of spontaneous pu- rification. Running streams may receive moderate quantities of organic matter and lose the same by chemical changes which take place in the water. In my report in 1872 I devoted con- siderable space to the subject of spontaneous purification, and quoted largely from the best European authorities to support the opinion which I gave, that such spontaneous purification takes place. This position was not satisfactory to those citizens of Albany, who had made up their minds be- forehand that the Hudson River water must be largely im- pure, and the possibility of such purification was seriously questioned in the discussions which ensued. This process has been thoroughly investigated in the past few years, and it is now admitted by all writers upon the subject. It is hardly necessary, therefore, to present any fur- ther evidence upon this point. The writings of Frankland, Tidy, Warington, Poleck, and many others, are very explicit npon the subject. Lest there may possibly exist unbelievers in this process I venture to insert the following quotations : " It must, nevertheless, be borne in mind that by the con- stant exposure of fresh surfaces of polluted water to the ac- tion of the atmosphere, which is accomplished in a running stream, the organic matter is oxidized, and may thus be eventually converted into products which are perfectly harm- less ; in other words, a river is competent to effect its own purification unless overtaxed with pollution" (Huxlev, 1878). " The decay of organic matter is the joint work of a num- ber of independent organisms of different functions, the ac- tion of one class following that of another, and carrying the process through a further stage. We are too Imperfectly ac- 8 9 o cn ft P Q M " I 2 ~ •!}toqur».iqw.x Qg^ poijp BpfJpS iw)c\x, s s CO 0> s s : Oini![()A ptltl OIUltAlQ Ills •Suiiioq o •ainijoq Bjojag g 8 I- IH CO co 2 sopuoiqo in ouuopio -jpquo.iqi?..! O ooi 0} po.pjoq uoq.w aopo I " r >. ■3 **a » ^ ^ O 5 I s a i "3 a «j CS « i CS i-T 5 > C V 0) > V > a) > C fly > a a 2 s s s a •r •0 s S •a a S 1 a ? -a s a a s H 33 a = a S5 5 2 00 10 TV. Results of the Analyses Expressed in Ten- thousandths of a Grain per U. 8. Gallon of 231 Cubic Inches. Locality. Mohawk Paver, above Diamond "Woolleu Mills Hudson River, above Lansingburg Troy Hydrant , Hudson River, at Maple Island Hudson River, at Albanv- At inlet, high tide . . . At inlet, At inlet, low tide . . . At inlet, " At inlet, high tide... At inlet, low tide Bleecker Reservoir Average for river water used at Albany Tivoli Lake Average for Tivoli Lake 1 1 Sodium te^ eni 3 „w\ ItXaZ nitrates and chloride. nitritep> Free 1 Albumi- ammonia. j monia. 2,160 411 26 43 • 2.1C0 2,160 1,540 144 166 358 9 8 87 89 48 3,090 3,090 3,400 3,400 2,160 1,700 3,150 3,150 161 154 275 168 377 353 282 285 37 22 16 29 31 37 30 27 59 83 7S 72 66 52 40 59 2,892 257 28 63 7,730 ! 7,730 8,960 296 356 778 107 115 220 47 163 69 8,140 477 147 93 Y. Results of the Analyses Expressed in Parts in One Thousand Million. Number. Locality. Sodium chloride. Nitrogen in nitratesand nitrites. Free ammonia. Albumi- noid am- monia. 1 Mohawk River, above Diamond Woollen Mills 3,710 705 44 74 7 3,710 3,710 247 150 284 15 151 5 2,650 614 14 82 5c 5s 6c 6s Hudson River, at Albany — 5,300 5,300 5,830 5,830 3,710 2,910 277 64 38 102 265 142 471 288 28 134 50 124 7 647 54 114 8 606 64 90 9c 9* 5,410 5,410 484 52 68 489 46 102 4,962 441 49 109 10c 10* 11 13,250 13,2f,0 15,370 507 184 80 611 198 280 ii 1,334 380 118 13,957 817 254 159 11 VI. American Watkbs. The Results are Expressed in Ten-Thouscnutths <>f << Gram per U. 8. Gallon of -J-'il '( \ihir Jnclo-s. Locality. New York City— Croton River Boston, Mass. — Cochituate Lake. Farm Pond Sudbury River. Springfield, Mass.— Broad Brook. . . Lowell. Mass. — Meirimac Iliver * . " t . " x . Worcester, Mass.— Blackstone River § M | M ^ Taunton, Mass. — Taunton River New London, Conn. — Lake Konomac Plymouth. Mass. — S.mth Pond Grand Rapids, Mich. — Grand River Toronto, Canada — Lake Ontario Philadelphia, Pa.— Schuylkill River. . . Delaware River Portsmouth, Va. — Dismal Swamp Cincinnati, O. — Ohio River Nashville, Tenn. — Cumberland River . . St. Louis, Mo. — Missouri River Mississippi River . . . Jersey City, N. J. — Passaic River Watertown, N. Y. — Black River Yonkere, N. Y.— Grassy Spring River Hudson, N. Y. — Hudson River Poughkccpsie, N. Y. Hudson River . . Brooklyn, N. Y.— Ridgewood Syracuse, N. Y. — Oneida Lake . . . Tally Lake ..m ix. . .min. . max. . min. .max. . .min. Dat e. Chloride of sodium. Nitro- gen in nitrates and nitrites. 1 Free ammonia. Albuminoid ammonia. Analyst. Dec, 1SS-1 3,090 379 5 39 52 113 E. Waller. W. R. Nichols. Nov., 1SS1 2,020 9 19 25 3 57 (17 202 158 176 „ Ira Remsen. E. S. Wood. Jan., Apr., 1876 1S73 2,429 1,M8 4,275 58 38 11 70 C. O. Thompson W. R. Nichols C. 0. Thompson Sep., 1S73 it 1,359 1,912 1,749 .... :::: 29 25 18 06 04 74 W. R. Nichols. : -! 1873 " 15.550 o.utr 5,053 .... 2.157 145 29 239 128 87 Aug., 1877 29 123 Dec, 1S79 93 it ii June, 1877 46 99 Nov., 1879 103 Hugo Thum. Nov., 1S81 3,207 134 • ; 63 W. H. Ellis. Jan., June, Nov., 1SS0 1880 1881 3.304 sv«ifl 9,135 18,175 886 356 17 5 o 10 145 104 15 110 G. F. Barker. A. R. Le. ds. H. LeiTmann. Nov., 18S4 896 469 13 437 E. Waller. Nov., 1SS0 12.79S 29 C. R. Stuntz. Oct., 1S70 2,8S7 005 23 U. T. Lupton Jan., 1>7» 7 15 122 519 G. W. Riggs. Jan., 18M) 2. 165 997 29 219 A. R. Leeds. June, 1S81 509 84 24 38 E. Waller. Feb., 1875 3.175 32 54 W. R. NichoK Nov., Dec, Jan., 1877 \s-- t 1878 ^880 3.175 34 29 71 88 88 77 Nov. 13/77 Nov. lit. "77 8.081 8,081 63 80 115 91 May. 1S«5| 11.013 9 17 E. EL Bartley. t 1- 1884 5.759 5,279 . 13 18 59 120 F. Engelhardt. * Above Lowell. t Below Lowell, above Lvwrence. X Below Lawrence. § Below Worcester. | Five miles below Worcester. ^ Twenty miles below Worcester. 12 Y1I. American Waters. The Results are Expressed in Parts in One Thousand Million. Locality. 3 4 5 7 8 9 10 11 12 13 14 15 If, 17 IS 19 20 21 22 23 24 25 20 37 29 30 31 32 33 34 35 36 37 38 89 40 41 42 jNew York City— Croton River .Boston, Mass. — Cochituate Lake max. " min. Date. Chloride of sodium. Nitro- gen in nitrates and 'nitrites. £ 2 ! ,5 s P o § 3 Dec, 1SS4 ! 5,300 Nov., 1881 Farm Pond max. " " min. Sudbury River max. " " min. Springfield, Mass. — Broad Brook Jan., April, Lowell, Mass. — Merrimac River* Sep., " t I " " t Worcester, Mass. — Blackstone River § . . . " II ... ' : T... Taunton, Mass. — Taunton River Aug., New London, Conn. — LakeKonomac Dec, Plymouth, Mass. — South Pond June, Grand Rapids, Mich. — Grand River Nov., Toronto, Canada- Lake Ontario Nov., Philadelphia, Pa. — Schuylkill River 9,900 3,465 1876 1S73 4.165 3,333 7,330 1873 2,330 3,330 3,000 1873 26.665 11,330 8.065 1S77 1879 1877 1879 18S1 ; 5,500 Delaware River Portsmouth, Va. — Dismal Swamp Cincinnati, O. — ■ Ohio River Nashville, Tenn. — Cumberland River. St. Louis, Mo. — Missouri River Mississippi River. . , Jersey City, N. J. — Jan., June, Nov., Nov., Nov., Oct., Jan., 18S0 1880 lb81 1884 1876 1878 5.605 5,000 15,065 31,165 1,537 21.945 4,950 Watertown, N. Y.- Black River . . Yonkers, N. Y.— Grassy Spring Hudson, N. Y.— Hudson River Poughkeepsi' 3 , N. Y.- Brooklyn, N. Y. Syracuse, N. Y. — Oneida Lake. . Tully Lake ... 651 230 1.520 610 805 1,140 June, 1880 3,712 1,710 June, 1SS1 874 145 Feb., 1875 5,445 Nov., 1877 Dec, 18^7 Jan., 1878 4,950 5,445 Nov. 13. -77 Nov. 19, '77 5.283 5,283 May, 1SS4 19,965 — , 1884 5 9,S76 9,053 :::: 07 5 16 34 43 5 100 66 20 47 44 31 3,700 250 50 51 50 12 19 30 10 so 23 50 13 26 50 24 55 59 51 123 109 104 16 22 32 Analyst. 90 195 99 116 450 272 302 S4 130 128 120 114 110 127 410 220 150 211 160 170 178 109 250 180 20 200 751 156 40 210 890 377 66 93 152 152 133 197 157 102 216 E. Waller. W. R. Nichols. Ira Remsen. E. S. Wood. C. O. Thompson. W. R. Nichols. C. O. Thompson. W. R. Nichols. Hugo Thnm. W. H. Ellis. G. F. Barker. A. R. Leeds. H. Left'mann. |E. Waller. Ic R. Stuntz. i N. T. Lupton. G. W. Riggs. A. R. Leeds. E. Waller. W. R. Nichols. E. H. Bartley. F. Engelhardt. * Above Lowell. t Below Lowell, above Lawrence. $ Below Lawrence. § Below Worcester. || Five miles below Worcester. If Twenty miles below Worcester. VIII. Waters of Great Britain and Ireland. The llesults are Expressed in Ten4hou8andths of a Grain per U. S. Gallon of 281 Cubic Inches. Number. Locality. Date. Chloride of sodium. Nitro- gen in nil rates and nitriies. . pi 9 '3 SB Albuminoid ammonia. Analyst. London, River Thames — 1 Chelsea Company March, 1888 18,471 1,248 35 35 Chloride of sodium 2 West Middlesex Company. 13,471 1,689 23 41 and nitrogen in 3 Southwark and Vauxhall nitrates, etc., t,y Oompftny 14,484 1,010 35 47 E. Frankland. 4 Grand Junction Company. 14.434 1,809 23 23 •Free and albumi- 5 I.ambeth Company it 15,3% 2,998 23 35 noid ammonia. London, River Len bv J. A. Wank- 6 New River Company 15,300 2.1S7 12 23 lyn and W. J. 7 Mast TiOndon Company. 1C..:;.")S 1,866 12 29 Cooper. a Nov., 18S1 1 1,6 17 1,826 15 20 F. P. Perkins. 9 Readin ,r River Ivcuurt 11,043 624 4 35 J. Shea. ,0 Worcester, Rivers Severn and .May, '2,027 624 41 H. Swete. 11 Kind's Lynn, River (iaywood.. Nov., 81,843 2,082 18 70 W. Johnstone. 12 11,043 3,330 8 38 R. Oxland. 13 Coatham. River Tees Dec, 1S77 7.704 373 68 58 C W. Wigner. 14 Isle of Wight. River Yar Sep., 72,205 583 41 59 15 Carnarvon, Qucllyn Lake it 14.071 233 2D 39 16 Mnyport, river water Aug.. 10,(i72 406 27 59 17 Whitehaven, Ennerdale Lake.. 7,814 236 30 20 18 Portmadoc, lake water Sep., 18.1.9 216 98 57 1!) Oct., 18,646 117 34 50 20 Llanfairfeohan, river water . .. Nov.. 10,730 288 12 28 21 April. 1S7<; not det. 150 6 50 Wm. Muir. 22 it It It 4c March, 1SS2 0,062 47 47 E. J. Mills. K Dec. , li>81 13,568 trace 17 50 C. A Cameron. * Average for twelve months. IX. Waters of Great Britain and Ireland. The Results are Repressed in Parts in One Thousand Million. Locality. London, River Thames— 1 Chelsea Company 2 I West Middlesex Company . 3 Southwark and Vauxhall Company 1 Grand Junction Company . 5 Lambeth Company London, River Lea — 6 New River Company 7 East London < 'ompany . . . ,s Bxeter, River Bxe 9 Beading, River Kennt t 10 Worcester. Rivers Severn and ! Vyrnwy 11 King's Lynn, River Gay wood. . 12 Plymouth, peat bogs 13 Coatham, River Tees 14 Isle of Wight. Hiver Yar 15 Carnarvon. Quellyn Lake 16 Mayport. river water 17 Whitehaven. Ennerdale Lake. . IS Portmadoc. lake water 10 Lynt >n, river water 20 Llanfairfeehan. river water 21 Glasgow, Loch Katri::e 22 " " •« * Dublin, Loch Vartry . Date. Chloride of sodium. Nitro- gen in nitrates and nitrites. Free j ammonia. o i 2 § - z. 5 £ - S < a Analyst. March ,1883 23.100 2,140 00 60 Chloride of sodium 28,100 2.640 40 70 and nitrogen in 24750 nitrates, etc., by 3,290 00 80 E. Frankland. 21. Toil 3.090 40 40 ■Free and albumi- 20,400 3,940 40 CO noid ammonia, 26, 100 by J. A. Wank- tt 3,750 20 40 lyn and \\ . .1. u 28,960 3,200 20 60 Cooper. Nov., 1881 l'.t.M'O 3,130 26 44 F. P. Perkins. 10. 963 1,070 7 00 J. Shea. 78.096 1.070 70 H. Swete. Nov., 87,456 4.600 31 120 W. Johnstone. 17.300 657 12 197 R. Oxland. Dec, 1877 i:i.-'0:> bin 117 100 G. W. Wigner. Sep., 121.915 1,0(1(1 71 101 tt 84,81 100 34 67 Am,'., 18,800 800 46 101 13.400 404 61 35 22,600 371 169 97 Oct., t. 28,4 n 200 6» or, Nov., 1S.IIKI 400 80 48 April, 1878 not det. 23S 10 S5 Wm. Muir. March, 18B9 111,395 SO ii 80 K. .1. Mills. Dee., l.\N| 28,266 trace * 29 86 C. A. Cameron. * Avcrago for twelve months. 14 quainted with the organisms effecting these changes, and their particular functions have been too little studied, for any accurate sketch of these processes to be given. In the first rank we must probably place the fungi, whose main function is apparently the rapid oxidation of carbon. Fol- lowing these we have the innumerable army of bacteria, em- bracing many families of very similar pl^sical structure, but endowed with very different chemical powers. One class of these bacteria attacks nitrogenous organic matter and liber- ates the nitrogen in the form of ammonia ; while another class of bacteria determines the conversion of carbonaceous organic matter and ammonia into simple organic bodies — carbonic and nitric acids. Lastly, we have the chlorophyll- bearing plants, which consume the carbonic acid, ammonia, and nitric acid produced by lower organisms, and are also capable of assimilating urea and other amide bodies, and a large number of inorganic ash constituents" (Warington, 1880). " En resume, the little beings which we have been consid- ering have an important role : they cause the return of dead organic matter to the atmosphere and to water. " Without them, organic matter, even exposed to the air, would not be destroyed, or would be transformed with ex- treme slowness, in consequence of a slow combustion pro- duced by oxygen. With them, on the contrary, its destruc- tion takes a rapid march and becomes complete. If, then, the equilibrium is maintained between living nature and dead nature, if the air has always the same composition, if the waters are always equally fertilizing, it is thanks to the infinitely minute agents of fermentation and putrefaction" (Magnin from Duclaux, 1878). Hulwa, in his investigation of the River Oder, before it enters and after it has passed through the City of Breslau, found that in its progress through the city the river showed increased pollution, and at its exit was greatly polluted. A short distance down the river the effects of dilution became evident, the self-purification of the river b}^ the combined action of the oxygen of the air and of the vegetable and ani- mal life in the stream were very marked, and the impurities diminished so rapidly that at a few miles below the city the water was as pure as when it entered it. Hulwa thinks it a mistake to forbid the outflow of sewage into rivers, provided the outfall is below the city and the rapidity and volume of the stream are sufficient to carry the sewage to such a dis- L5 tance as will allow the operation of natural causes of purifi- cation (1884). The nc lion of air in effecting, directly or indirectly, the pu* rification of water has been practically tested within the last year or two, in Boboken and Philadelphia, where air has been systemat ically pumped into the water for the purpose of has- tening the operation. A further comparison of the Hudson River water al Albany with the chief waters used in America and England for city supplies, demonstrates the fact that the Hudson River water does not contain any excessive quantity of organic matters, and the application of these new methods of analysis confirms the opinion which I originally reached with regard to this water. In a recent report of the Committee on Drainage, Sewage, and Topography of the State Board of Health, the statement is made that " the experience of the past ten years hascleaiiy demonstrated that the chemical test cannot detect the specific poisons of zymotic diseases, and therefore the results of chemical analysis of the water of the Hudson River are no proof as to its safety for drinking purposes." This is no doubt the opinion of the Committee, but it is not the opinion of those persons who have had considerable experience in the examination of waters for sanitary purposes. I do not mean to say that chemical tests will detect the specific poisons of zymotic diseases in water. For that matter there is no method of investigation yet proposed which can accomplish this, except the actual production of the diseases, and no one has ever found in a river-water the specific poison of any zymotic disease. Dr. Koch thinks he observed the cholera bacillus in a water-tank at Calcutta in which persons suffer- ing from cholera bathed and washed their clothes, and this is the only case in which any reliable authority has ever claimed to have found disease-germs in water of any kind. In 1880, Dr. Tidy, of London, one of the best authorities on the subject of water examination, made the statement that " in all well-proved cases of outbreaks of disease resulting from the use of drinking-water, such water would have been unhesitatingly condemned on analysis by the chemist." The Committee of the State Board of Health attempts to sustain its condemnation of chemical analysis by reference 16 to the epidemic of typhoid and typho-malarial fever in Bath, Steuben County, during the past year. In this case there is no evidence that the disease originated with the well-water. The printed analysis shows further that the water was very impure. It contains 37.6 parts in 100,000 of total impurities, while the quantity contained in the Hudson River water at Albany aver- ages only about 10 parts in 100,000. This well-water further shows the presence of 9,900 parts of nitrogen derived from nitrates and nitrites in one thousand million parts of water, which is an enormous quantity. It should further be remem- bered that well-waters cannot be considered upon the same basis as river waters. The well contains a small quantity of water, which is not in motion, and which is not brought freely into contact with the air. Moreover, well-waters are very vari- able in composition. The}^ are liable to temporary defilement, so that while at one time a well-water may fail to disclose any alarming peculiarities to chemical analysis, it may at a later period, owing to a change in the condition of the ground- water in its neighborhood, or to some accidental pollution, become charged with offensive matter. All chemists realize the fact that it is never safe to decide the condition of a well from a single analysis of the water, as no matter how pure the water may prove to be by analysis on any particular oc- casion, there is no certainty that this condition of purity will be maintained for any length of time. The river, on the other hand, is not subject to sudden variations in the quality of its waters. The conditions that surround it are pretty nearly uniform from one end of the year to the other, the greatest extremes being those which result from high water and low water. The opinion of the Committee as to the value of chemical analysis, as far as it is based on the Bath out- break, is without adequate foundation. The slight turbidity or opalescence which is noticed at times in the water drawn from the hydrants at Albany, is due to the clay which is so abundant in the Hudson and Mohawk vallej^s, either as soft clay or as crumbling shales. It has been shown by Professor W. H. Brewer, that clay settles very slowly from pure waters. It will be noticed that the analyses of the water from Tivoli Lake, show a much larger amount of sodium chloride, nitrates, and of free and albuminoid ammonia. I did not visit 17 the lake, but I am satisfied from the analyses that drainage- water finds its way into this body of water. EL — BIOLOGICAL AXALYSIS. Great stress is now laid by many persons on what is called the biological analysis of water, and much has been pub- lished upon the subject within the last few years. It has been known for more than two hundred years, that minute organisms exist in wa ter. They were discovered by Leeuwen- hoek. in rain-water, in 1675, and have been studied with great interest ever since. Some are known to be animal in charac- ter, others vegetable. They have been carefully studied and classified, but while they were extremely interesting to the botanist and the zoologist, they attracted very little attention from the chemist and the etiologist till quite recently. They first came into general notice in the study of fermenta- tion, which had been supposed by many to be a purely chemi- cal process, but which was finally traced to the agency of these minute organisms. It was found that there are a great many different kinds of fermentations, each of which is due to some one specific organism. The further stud}' of these organisms led to the revival of the theory of spontaneous generation, and many elaborate investigations were made into their origin. Finally, it was found that most kinds of contagious and infectious disease, and many diseases that had never before been recognized as infectious, were due to peculiar micro-organisms. These discoveries gave rise to what is known as the "germ theory" of disease. I have had special occasion to study this subject for various reasons in connection with my duties, and ten years ago I carefully examined the publications of the most active investigators of the subject in preparing an article on ''Fermentation" for " Johnson's New Universal Cyclopedia." When it was proposed, therefore, to determine the sanitary quality of water by microscopic examination, either of the water itself, or of the culture-fluids or solid me- dia planted wirli water, I was not taken by surprise, bnl was in a position to realize how much and how little might be ex- pected from this method of examination. IS Biological analysis lias thus far been resorted to for the purpose of determining the number of germs or spores of micro-organisms contained in a given sample of water, and by counting them to decide on the relative value or safety of the water for domestic use. If these organisms, whether bacteria, algae, or mould fungi, were only contained in pol- luted water, or if they were injurious to life, this method of examination would undoubtedly be extremely valuable, but as a matter of fact these organisms are found everywhere in nature. They have been shown by Deherain, Maquenne, Koch, Miguel, Warington, and many others, to exist in all soils. They have been shown by everyone who has studied the subject to be constantly present in the atmosphere. The following quotation from the work of Cooke and Berkley on the fungi, expresses the universal opinion with regard to the occurrence of bacteria and other fungi in the air : " Spores and other vegetable cells are constantly present in atmospheric dust, and usually occur in considerable numbers ; the majority of them are living and capable of growth and development. The amount of them present in the air appears to be independent of conditions of velocity and direction of wind, and their number is not diminished by moisture. ' ' No connection can be traced between the numbers of bac- teria, spores, etc., present in the air, and the occurrence of diarrhoea, dysentery, cholera, ague, or dengue, nor between the presence or abundance of any special form or forms of cells and the prevalence of any of these diseases." Bacteria are always present in water. Magnin and Stern- berg say rain-water will always be found fertile in germs, and when it is collected with care it represents the bacterial flora of the atmosphere at the time of its fall. The following quotation is additional proof on this point : "Water contains considerable quantities of bacteria and especially of germs. Their presence in atmospheric water is established by the experiments of Lemaire and Gratiolet, — and after them by more recent observers — by means of condensers filled with ice, and placed in the fields, and for comparison, in closed apartments. Rindfleisch has since ex- pressed the opinion that the vapor of water does not contain spores or bacteria, and that telluric waters alone contain them ; but Billroth, Cohn, and others have proved that Rind- fleisch was too positive in his statement. "It is not surprising that telluric waters contain such a L9 quantity of bacteria, that their existence is admitted by all. The dust gathered upon the surface of stones, of leaves, of fruits, etc., shows upon microscopic examination an abun- dance of germs (Marie-Davy, Tissandier) ; the washing of these objects and of the soil by the ra in, transports them into the rivers, and from the rivers to the sea, w hich contains con- siderable quantities of them. "Thus, a drop of water from the Seine, according to Pas- teur and Joubert, is always fecund, and may give birth to several species of bacteria. The distilled water of labora- tories also contains germs, and these of so small a diameter that they pass through all filters. Colin lias proved that some are not arrested by a superposition of sixteen filters. The only waters which do not contain them are those drawn from the very source of a spring." (Magnin.) It should further be noted that all kinds of food contain bacteria and other micro-organisms. Nothing is richer in bacilli than ordinary hay, from which they are never absent. Finally, I would call attention to the fact that human beings are never free from them. They occur in the body in life ; they are constantly found in saliva, and the mucous mem- brane of the alimentary canal exhibits myriads of them in a state of activity. They are found upon the surface of the skin, in the bronchial passages, and in fact wherever air, water, or food are brought in contact with the body externally or internally. Pasteur recently read a paper, by Duclaux, before the French Academy of Sciences, in which he claimed that the presence of bacteria is indispensable to the germina- tion of seeds and also to the digestion of food. Colin says : " Bacteria belong to the most wide-spread of organisms ; we may say they are omnipresent; they never fail either in air or water ; they attach themselves to the surface of all firm bodies." And according to Magnin : u The bacteria are of all beings the most widely diffused. We meet them everywhere, in the air, in water, upon the surface of solid bodies, in the interior of plants and animals. If we expose a transparent Liquid containing traces of organic substances, we find after a short time that it has become clouded, and the microscope shows us that it contains myr- iads of these beings." 20 Under these circumstances it would appear that counting the number of bacteria that will develop in gelatine, or in other culture media, on the addition of a sample of water, is not a very reliable method for determining the danger of water for domestic purposes, although some enthusiastic mi- croscopists, carried away by their skill in raising bacteria in their microscopic gardens, have said that the days of chem- ical analysis of water supplies are numbered. W. R.Nichols remarks in speaking of biological analysis : " None of these methods have reached the subject of prac- tical utility, and it must be left entirely with the specialists to interpret the results of their own observations." Dr. Robert Angus Smith, who made a great many biologi- cal examinations of water with gelatine, in which he noted particularly the production of little spheres of transformed gelatine after the addition of water, remarks as follows : 4 'We must be careful in drawing conclusions as to the wholesomeness of the water tried ; the existence of spores of transformed gelatine caused by organisms is no proof that the water is unwholesome." Dr. Frankland has also tested biological methods, and in one of his papers he states, speaking of such methods : u My own experiments completely conform with Mr. Heidi's observations, with two important exceptions, viz. : that, firstly, the fungi growths are not peculiar to water contaminated with sewage ; and secondly, the germs from which they originate are present in all water which has been even momentarily in contact with the air." It is claimed by some of the biological experimenters that if a solid jelly, to which a little of the water has been added, becomes fluid in a short time, owing to the development of bacteria, it is proof positive that the water is contaminated with sewage, and that it is unwholesome. I have applied this test to the waters from Albany, in comparison with Croton water, and with water from the Hackensack and the Passaic. In all cases the gelatine be- came fluid from the growth of organisms, which were readily seen under the microscope. At the same time I simply ex- posed to the air some jelly made from calves' feet, some clear 21 bouillon prepared from lean beef, and slices of white and Graham bread. The calves' -loot jelly soon became fluid, the beet' bouillon became turbid, and both became opaque and offensive. Under the microscope both were found to contain myriads of bac- teria, some quiet, some in active motion. The slices of bread, which were covered with bell jars to prevent their becoming dry, were soon covered with a luxuriant growth of mycilium fungi or mould plants, white, green and yellow. Now if the organisms in the gelatine, to which the samples of water were added, prove the water to have been contam- inated with sewage, what can be said of the air of Xew York which filled the calves' -foot jelly and the bouillon with simi- lar organisms, or covered the bread with the mould fungi i Had the jelh^, bouillon, or bread been exposed to the air of any other locality in the United States, the result would not have been different. The truth is, the germs of micro- organisms occur in all water and all air, and all that is neces- sary for their development is the proper soil, that is, organic matter, such as the jelly furnishes. We have daily proof of this in the spontaneous fermen- tation of the juice of the grape in wine making, the transfor- mation of cider into vinegar, the souring of beer and light wines, of milk, of food generally, the ripening of cheese, the decay of timber, and the putrefaction of all animal and vege- table matters. All these processes can be prevented by simply excluding the germs which are contained in the air, as is done in "canning" food, or by destroying their vitality by heat or antiseptics. When the biologist learns to detect in water k< the specific poisons of zymotic diseases," and to distinguish them from the harmless organisms that we eat, drink, and breathe with impunity all our lives, then we may set up biological analysis as superior to chemical analysis, for the selection of drinking water. Up to the present time, however, biological analysis will not tell us anything with regard to the Hudson Kiver water that we do not already know. The river receives a small amount of drainage, and thanks to the oxygen and the micro- organisms, it becomes so thoroughly purified that, when it reaches the Bleecker reservoir for distribution in Albany, it may be drank without danger to health. 22 Some stress has been laid on the fact that nematoid worms were found in the mud taken from the basin near the mouth of a sewer. While it is not claimed that these worms were found in the water of the river, the only object in mentioning them was to associate them in some way with the water- supply. I would simply note that they are of no significance in any case, as nematoid worms are found in all fresh water, especially in ponds and lakes. They are also found in sour paste, and in vinegar, and are well known to microscopists as paste eels and vinegar eels. Speaking again of the omnipresent organisms which are harmless to man, the zymogenic organisms which produce the fermentations — alcoholic, acid, viscous, etc. — and the sep- tic organisms which produce putrefaction, it has been sug- gested that under certain extraordinary influences they may undergo some peculiar change by which they may develop into pathogenic organisms, capable of producing some specific germ and its zymotic disease. This has actually been claimed in several cases, but it is clearly settled now that in no one of these cases was there any satisfactory evidence of such a change. The pathogenic organisms are distinct and peculiar, and are not in any way developed from the others. III. — ADVANCES IN THE KNOWLEDGE OF ZYMOTIC DISEASES. Since the biologists have perfected their methods for studying micro-organisms by the addition of new methods of staining, culture, and inoculation, the most wonderful advance has been made in the knowledge of zymotic diseases. The labors of Pasteur in investigating the diseases of silkworms, of Davaine, Koch, and Pasteur in investigating splenic fever, of Pasteur on chicken cholera, of Obermeyer and Carter on relapsing fever, of Pasteur on swine plague, of Koch on tu- berculosis and cholera, and of these and other observers on many other diseases, have thrown a flood of light on the eti- ology of zymotic diseases. It would seem as if a few years would make the biologist master of the situation ; as though this class of diseases may perhaps be brought entirely under 23 the control of the physician, by a kind of preventive inocula- tion, as is now the case with smallpox. But after all, this advance in knowledge 1 lias not as yet thrown any light on the question we have before us. Is the water of a large river, which has received a certain amount of drainage, a safe beverage for a city ? Nothing in the dis- coveries of these great investigators enables us to say thai this water is unsafe. It is believed that typhoid fever and diarrhoea! diseases have often been disseminated by polluted wells, but no cases of these diseases have ever been traced to the waters of a large river. The Cholera Question. It having been established with some considerable degree of probability, that the wells in certain parts of London had aided in disseminating the cholera poison during the succes- sive visitations of that disease to the metropolis, an opinion had gained credence that the water of the Thames had con- tributed in no small measure to swell the awful list of victims who died from that disease, especially the water supplied by the East London water-works. Considerable testimony was therefore taken upon this point by the Water Commission, the most important of which I will quote. Testimony oe Dr. Robert Axgus Smith, Government Inspector. u If the germs pass into the rivers we do not know how far they may be carried. On the other hand, we do not know that they ever can be carried in pure water, the dissolved oxygen may destroy them, as it unquestionably does putres- cent matters. A positive 1 proof of their transmission, in otherwise pure water, is wanting. One might ask if a cholera germ in the water at Oxford would produce disease 1 in Lon- don, and one might answer by asking if one cholera germ passing into the air at Woolwich would produce disease in Pimlico. This we do not know, but it seems probable that disease cannot be carried far by pore air, nor by water with much oxygen in it, which is equal to pore air. We are in- formed that the atmosphere is full of germs, but the evidence seems to be that it requires an unusual excess to attack as successfully, ir seems to be a question of quantity." 24 Testimony of Dr. Letheby, Medical Officer of Health to the Corporation of London. Q. " You are aware that it has been alleged that the main cause of the cholera, in the east end of London, was due to he water-supply; do you entertain that opinion ? " A. " No, I entertain the opposite opinion; it was a matter of duty with me to investigate the whole of the circumstances connected with the East London supply ; in the first place it was supplied to the hospital to which I am attached, in the next place it was supplied to the eastern division of the city, where, as officer of health, it was my duty to look well into the matter, and in the third place I had a general interest in it scientifically, apart from any official connection with the subject, and I was very desirous to ascertain whether or not the water had been in any way concerned in the propagation of the disease ; I therefore investigated it very fully." Q. " Do you think the present supply of water to the Lon- don people is wholesome water 1 " A. "I do, a thoroughly wholesome water." In his report on the sanitary condition of the city of Lon- don for the years 1866-67, Dr. Letheby is much more explicit in his discussion of the cholera epidemic of 1866. He says, on page 26 et seq. : "But difficult as the problem is, to determine the exact value of the several circumstances which influence the severity of the disease, and especially those which give to it its marked local intensities, enough has been ascertained to indicate its general habits, and to show that it fixes itself at low levels in proximity to tidal rivers, among dense populations, that are living in ill-constructed houses, that are filthy, badty venti- lated, badly drained, and generally defective of sanitary pro- visions ; and the inference is, that the actual agent of cholera, be it what it may, can only find congenial conditions for its full development in damp and impure air." "The theoiy of Pettenkofer is, that the essential conditions for the active manifestations of the disease, are a porous soil, charged with excrementitious matter, and having a certain degree of hydration, as happens when the subsoil water has been just drawn off or is slowly retiring. All these con- ditions were singularly coincident with the localization of the disease in the eastern districts of London ; for the soil is gravelly, and therefore very porous to air and water, and it is largely charged with excrementitious matters derived from the local tide-locked sewers. It is also remarkable that for some months before the outbreak of the disease, the subsoil water had been gradually sinking in consequence of the drainage operations that were necessary for i li< • construc- tion of the main low-level sewer, and its branch to the Esle of Dogs. Now, according to Pettenkofer, it is exactly under these circumstances that a district is most Liable t<> choleraic infect ion." "The alleged pollution of the water rests upon a series of assumptions, many of which are in the highesl degree im- probable." "Apart, however, from the improbabilities of these as- sumptions, it is a fact that the water which is said to have been thus polluted did not produce its effects in tlx- several districts to which it was distributed in anything like uni- formity of time or force. Suppose, by way of illustration, that alcohol or arsenic had become mixed with the water, and that on a certain day it was distributed to the public, we should expect to find that the action of the poison was not only manifested at the same time over the whole district of supply, but that it was confined to that district. Not so, however, witli the water in question, for although it is not alleged to have been more than once polluted, yet the first effects in the several districts occurred at long intervals ; and there were many places to which it was distributed, where there was no sign of the disease ; while others, which did not receive the water, were seriously affected." "More remarkable still, there were places in the very heart of the cholera field, and others close adjoining it, where the residents received the same suspected water, and used it freely without suffering in the least degree. In the Lime- house School, around which the cholera was frightfully fatal, there were 400 children who drank the same water as their neighbors, and yet there was not even a case of diar- rhoea among them. In the London Hospital, which is also in the heart of the cholera field, for it is surrounded by the districts of Whitechapel, Bethnal Green, Mile End, Old Town, and St. George' s-in-the-East, there was an average resident population of 403 persons, and, although they drank freely of the unliltered East London water, yet there was not a case of illness among them/' "Again, in the eastern division of the city of London, which adjoins the cholera field, the suspected water was supplied to 101 houses, with a population of about 1,732 persons, butexcept in oneof these nouses (20 Somerset St reel . which is on the boundary of Whitechapel, there was nol a single death from cholera, and to verily this. I have obtained the addresses of all the persons who died in the cholera ward in Bishopsgate Street. Bui, besides this, the disease was singularly fatal in places where the Buspected water was aever used. In Crown Court. Blue Anchor Yard, Whitechapel, where the water-supply is from the New River, the mortality 26 was at the rate of 284 per 10,000. In Boar's Head Yard, of the same district, which is also supplied by the New River, the death-rate was 193 per 10,000 ; and indeed there are eighteen courts in Whitechapel, where none of the East London water was used, and yet out of an aggregate population of 4,351 persons, there were 30 deaths from cholera, the mortality being at the rate of 69 per 10,000 ; that of the whole district being but 77." "So that, on carefully examining the facts in their rela- tion to the water theory, we find : 1. " That there is no proof whatever of choleraic pollution of the water." 2. " That there was no coincidence of time in the appear- ance of the disease in the several districts supplied with the suspected water." 3. "That numerous districts receiving the same water, but situated at high level, or placed beyond the cholera held, were entirely exempt from the disease." 4. "That even in the very heart of the cholera field, there were places receiving and using the suspected water with impunity. 5. "That other places not supplied with the water, but situated within the infected area, suffered equally with the neighborhood." "I am far from wishing it to be thought that choleraic matter diffused through water will not produce disease. There is abundant evidence to show that it is often a prolific source of it ; but I am anxious, in dealing with a question of so much public importance as the origin of the late epidemic, that none of the facts should be perverted, and that no hasty or ingenious hypothesis, without solid foundation, should take possession of the public mind. In the conduct of in- quiries like this, there should be a calm, a full, and a candid examination of the facts ; — we should endeavor to study the phenomena in a philosophical spirit, and apply to them the tests of sound induction ; we should strive also to deduce from them such laws as will not only expose the nature of the malady, but will, at the same time, enable us to treat it successfully. Rash opinions, boldly asserted and tenaciously held, though they may force themselves on public attention, rarely lead to useful results ; and while they have their hold on the popular mind they seriously hinder the progress of real knowledge." These extracts are sufficient to indicate the opinions of the most eminent medical officers who have considered the fitness of the waters of the Thames for supplying the people of Lon- don with wholesome water. 27 The verdict of the commissioners, after can-fully and con- scientiously weighing all the testimony presented, is as fol- lows : " The only point raised against the Thames water on the ground of organic contamination isof less positive character ; it is said that water which has been once contaminated with sewage, may still contain undecomposed organic matter, which, though inappreciable by the most delicate chemical tests, may still exercise prejudicial effects on the human system." " The strongest form of this objection has reference to some opinions now prevalent, that certain forms of disease, such as cholera and typhoid fever, are propagated by germs contained in exereniental matter; and it is conceived possi- ble that when matter of this kind once gets into streams, these germs may escape destruction and long preserve their dangerous character. It is said that no process is known by which such noxious material can be removed from water, and, therefore, it is argued, that water which has at any time been contaminated by sewage is henceforth unsuitable for domestic use. But we cannot admit them as sufficiently well established to form any conclusive argument for abandoning an otherwise unobjectionable source of water-supply ; we are of opinion that there is no evidence to lead us to believe that the water now supplied by the companies is not generally good and wholesome." This report was made in 1869, and has been before the British public in an accessible form, in all its details, sixteen years, and its conclusions have been generally accepted. Cholera ix 1884. A fresh opportunity was offered last year for studying the propagation and dissemination of cholera. Dr. Koch had succeeded in detecting peculiar comma bacilli in the intestines of persons who had died of cholera in Egypt and Calcutta : and he has satisfied himself that these bacilli are the true originators of the cholera. As he has been the most successful investigator of pathogenic bacteria, his opinion carries g] - a t weight. Nevertheless, there are man}- who are not yet con- vinced. Dr. Koch noticed "that the cholera often settles in a par- ticular locality, and displays its greatest virulence in certain quarters. Such epidemics are frequent ly observed in thesur- 2S roundings of the so-called ' tanks,' which are small ponds or wells enclosed within huts. The neighbors obtain their water-supply from these tanks, and simultaneously utilize them for various purposes — such as bathing, washing cloth- ing, cleaning domestic utensils, etc." In one of these tanks Dr. Koch discovered the comma bacillus, and thus found an argument in favor of the trans- mission of cholera by the water-supply. Not of a large river, to be sure, but by a " tank." A very animated discussion has arisen from these observations, and the cholera in the South of Europe last summer has furnished much material. The outbreaks in Toulon, Marseilles, Italy, Spain, and Paris have been very carefully studied, and thus far no evidence has been secured to connect the spread of the disease with the water-supply. One writer says : " The microbists' theory of cholera propagation rests mainly on the hypothesis that water is the agent that spreads the disease. Now, Paris is supplied with water from four different sources, and the cholera broke out almost simultaneously in quarters the farthest removed from each other, and furnished with totally distinct water-supplies. It was predicted that those who drank the Seine water would be the chief sufferers, owing to the extent to which it is con- taminated. The prediction has not been verified. The most virulent outbreak was in the charitable institution kept by the sceurs liospitalieres, where over sixty inmates died in a few days. This home is supplied with the water of the Vanne — beyond all comparison the purest that is brought into Paris." P. DeLuna says (in the Compt. Bend., 97, 633): " The cause of cholera always exists in the air, and is transmitted by per- sons and things. It generally acts through the organs of res- piration, and incubation generally takes place when the in- dividual is in a passive condition, and particularly during sleep." M. Gibert, in describing, in the Mevue Scientifique, the outbreak of cholera at Yport, near Havre, says : " The cholera was brought to Yport by insufficiently disinfected clothing, soiled by cholera dejecta ; that the disease was propagated from house to house ; and that the question of water has no bearing in the case, for the very good reason that the Ypor- tais never drink any." In a long article on "Cholera," which runs through sev- eral numbers of the London Lancet in November. 1884, Dr. 29 Max von Pettenkofer, of Munich, (he leading sanitary au- thority in the world, makes the following statement; : " The further one investigates the drinking-water theory the more and more Improbable does it appear. Robert Koch, too, the famous bacteriologist, has hitherto failed to substantiate the drinking-water theory, and I fee] convinced that the time is not. Par distant when he w ill own thai he has gone in the wrong direction. Koch has succeeded in finding the comma bacillus in a water-tank in a region where cholera was prevalent. I have the greatest respect for this impor- tant discovery, not as a solution of the cholera question, but only as a very promising field for pathological, not epidemi- ological, inquiry. It must be remembered that cholera was already prevalent in the neighborhood of the water-tank from which Koch obtained the bacillus. Now, this tank was used not only for drinking purposes, but also for bat hing the per- son and washing clothes, as Koch himself admits. Accord- ing to my view the comma bacillus must have been present in the water. It had not been shown, however, that the bacillus was in the water before the outbreak of cholera. Koch is of the opinion that all the bacilli in the water-tank could not have come from the washing of clothes of cholera patients, but must have partly been derived from multiplication, yet he forgets that, as he himself has shown, the meat-broth in which the bacilli grow must not be too dilute. It would have been interesting if Koch had estimated the strength of the nutritive material in the water-tank. But what chiefly contradicts the doctrines of the contagionists is the simultan- eous disappearance of the cholera on land and the cholera bacillus in the water-tank, if it were really true that every case of cholera, the first as well as the last in an epidemic, had the same infective material in its intestinal discharge, and that the epidemic only ceased because the susceptibility of man had passed away, then the bacillus would continue to exist in the tank, always supposing that there was sufficient pabulum for it. And thus it is most probable that the bacillus gets into the tank from man, and not vice versa. While Koch was in Calcutta the English physicians there imbued him with their views on cholera and drinking-water. The English had been brought up on the drinking-water theory of typhoid fever and cholera, and could only lay it aside with difficulty. But a few of those English physicians who had studied wide- spread epidemics had renounced their original ideas. Dr. Bryden (the chief of the Statistical Department), Dr. J, M. Cuningham (the Sanitary Commissioner), Dr. John Mac- pherson (the Inspector-General of the Bengal Army. Dr. Lewis, and Dr. Douglas Cunningham, were au disbelievers in the drinking-water theory.-' 30 I quote these opinions not because I entertain them all myself, but to show that the best authorities do not sustain the theories or the fears that have been expressed by the op- ponents of the river water at Albany. I believe that wells and small streams may be so polluted as to disseminate dis- ease. IV. THE TEST OF EXPERIENCE. When, in 1872, I first had occasion to consider the question of employing the Hudson River water at the city of Albany, I was limited in my study to the chemical examination of the water by the methods then in use, and to the careful comparison of the size of the water-shed of the Hudson River and the populations residing thereon, with the water-sheds and population of other large rivers used successfully as a source of water supply. My conclusion in favor of the use of the water at that time was arrived at with a full appreci- ation of the great responsibilities of the decision. In the following spring I was placed at the head of the Health Department of the largest city in this country, and for eleven years a large part of my thought and study was directed to sanitary questions. I found myself compelled to study every subject bearing upon the public health, and I have never lost sight of the important issues involved in my decision of the Albany water question. I have from time to time made inquiries with regard to the health of the citizens who were using the water of the Hudson River, and it has always been a source of great satisfaction to me to learn that the health of the people of Albany continued to be remark- ably good, and that no evidence was presented to indicate that the use of this water had resulted in any ill effects, and I have never had occasion to regret the advice I gave at that time. The diseases which have been attributed to polluted water are especially typhoid fever and diarrhoeal diseases, with which the city of Albany has been less afflicted than most other . large cities in this country, many of which are supplied with water of the highest degree of purity. I am satisfied, therefore, that the test of experience fails to present any facts which would indicate that the Hudson River water is unwholesome. The following Tables XII and XIII present the deaths from these diseases in Albany and the towns above, and also for further comparison, New York ' 'it y, Brooklyn, inn! Roch- ester. The figures were obtained from tlx- hist four Bulletins of the New York State Board of Health -the only ones to which I had access. As the city of Troy receives the Hud- son River water from above Lansirigburg, it would naturally be inferred that if the water becomes polluted through its passage past the city of Troy there would be an increase in the death-rate of the city of Albany from the diseases attrib- uted to polluted water. It will be observed that this is not the case, but, on the contrary, the returns from the city of Troy indicate a much larger death-rate from these diseases. It may be said that these returns are not complete. 'Phis is no doubt true. A note at the foot of the November lhilltthi of the State Board of Health remarks that, "The returns from several localities, Troy especially, are notably incom- plete," and a note to the December Bulletin says, " In Troy the actual burials for November were found on investigation to be 146, but 43 having been reported ; the December returns show improvement, but are still incomplete. Returns from Cohoes are utterly unreliable and are now under investiga- tion by this Board." It would appear, therefore, that the incompleteness is particularly in the Troy returns, and that if the full death-rate were recorded the contrast between Troy and Albany would be much more striking, the Albany returns beins; considered the most reliable of them all. In Table XIII the death-rates per 1,000 per annum are presented, computed from the numbers contained in Table XII. It will be noticed that in the fourth column the typhoid fever and malarial diseases have been added together. This is done because it is well known to every physician who has had occasion to investigate deaths attributed to malaria, that in the majority of cases the deaths were really due to typhoid fever. These figures clearly show that there is nothing in the vital statistics of Albany to indicate that any evil result has ever followed the introduction of river water. 32 XII. Deaths from Typhoid Fever, Malarial and Diarrheal Diseases, for the last Four Months of 1SS4. Extracted from the Monthly Bulletins of the State Board of Health of New York. ALBANY — Population 97,344. Deaths. Rate per 1,000. Typhoid. Malarial. Diarrhceal 153 IS. 86 I 23 148 18.25 8 141 17.:i9 5 g 4 140 18.00 1 1 3 588 18.12 17 3 38 TROY -Population 60,000. 130 26.00 7 25 70 14.00 4 1 4 43 8.6(1 3 1 1 81 16.20 1 o 1 324 16.45 15 2 31 WEST TROY — Population 13,000. i? 24.00 3 5 15.69 2 3 20 18.46 26 24.00 2 1 89 20.54 i 7 9 LANSINGBURG— Population 8,500. 22 31.00 ! 2 27 38.11 21 29.64 25 35.30 95 33.74 2 COHOES— Population 20,000. 1 15 9.00 1 4.20 1 12 7.20 1 12.60 1 1 55 ! 8.25" 2 1 4 GREEN ISLAND — Population 5.000. 12.00 , v I ~ 6 14.50 o 6 14.50 ! 7 16.80 1 1 ~ 14.37" 2 1 NEW YOIIK CITY— Population 1,356,958. 26.45 62 34 1 540 22.48 (i6 57 301 ! 2.S07 24.82 54 39 ! 95 i MW 26.42 35 23 45 Four months . . 25.04 ~217~ 153 ~l 981 BROOKLYN— Population 644,526. 1.369 1 25.49 19 33 339 October 1.1 si 1 21.99 19 41 149 1,066 19. S3 13 32 31 1.253 1 23.33 8 29 14 4,869 l 22.66 59 135 533 ROCHESTER — Population 101,000. 181 | 21.50 4 42 146 17.35 7 IS 135 16.04 9 2 1 137 16.27 9 3 599 1 17.79 29 2 64 XIII. Death-rates per 1,000 per Anntm foi: the last Months of 1SS4. Computed from the Bala Contained in Table Xlf. DUB Albany Troy West Troy . . Lansin-jburg, Cohoes Green Island New York . . , Brooklyn Rochester Deaths _ ... from all I causes. IS. 12 10.45 20.54 33.74 8.25 14.37 25.04 22.0(1 17.79 fever. 0.525 0.750 1.620 0.300 1.200 0.480 0.270 0.861 Malarial diseases. 0.090 0.TXM) 0.150 6.339 0.630 0.060 Typhoid fc- rec and innla- rial diseases. 0.f,15 0.849 1.620 0.450 1.200 0.819 0.900 ('.921 Dlai rhoM discaM -. 1.173 1 548 2.070 0.788 0.000 o.oou 9.169 v. I- l 1.899 CONCLUSION. After applying every possible method of investigation to the Hudson River water, I am free to say that I find no evi- dence to lead me to change the opinion I expressed in 1872. There is no reason why the city of Albany should not con- tinue to use this water. Except at Troy, no sewerage of any consequence is dis- charged into the river; and even here, the volume of sewer- age is so small in comparison with that of the river, that it does not make any impression upon it. The average volume of the Hudson at Albany was es- timated by Mr. Sweet to be 618,111 cubic feet per minute, equal to an average daily flow of 6,677,000,000 gallons. The minimum being 1,829,000,000 in July, and the maximum 12,330,000,000 in March. In 1883, the engines pumped an average of 6,064,000 gal- lons daily, or yyVg- of the average flow of the stream. I must not omit to call attention to the unusual combina- tion of circumstances by which the most complete aeration of the water is effected. Glens Falls, the falls of the Mohawk at Cohoes, and the State Dam at Troy, are the most effective means contrived by nature and art for preparing the water for the use of your citizens. 1. Chemical analysis shows that the water compares favorably with that of other cities in thi^ country ami Ku- rope. 3 34: 2. Biological analysis reveals nothing in the water that has ever been known to produce sickness. 3. Culture experiments have failed to connect in any way the omnipresent organisms which are found in all waters with any diseases, or to make it probable that they are likely to produce any evil effects. The experience gained during the recent outbreaks of cholera in the East and in Europe have added nothing to the knowledge of this disease that makes it probable that, in case we have an invasion of it next summer, the river water would be likely to aid in introdu- cing it into your city. 4. Experience in using the water for the past ten years has demonstrated its freedom from objectionable constitu- ents. There have been no epidemics during that time, and the city has been less afflicted with the diseases which are generally supposed to spring from polluted water, than Troy and other towns, that take the water above that city ; or than New York or Brooklyn, which are supplied with unusu- ally pure water. 5. With regard to the pollution of the water-supply by the action of the tide on the water which flows out of the Basin, I can only say that if anything is added to the water from this source it must be extremely small in quantity. Several of my samples were taken from the river at the inlet, half at low tide and half at high tide, and several were taken from Bleecker reservoir. None of these samples show the presence of such contamination, and they could not have failed to do so, had there been any to show. Although there is no ap- preciable contamination from this source, I would nevertheless stronghv urge the adoption of the recommendation of the Committee on Drainage and Topography of the State Board of Health with regard to cleaning out the Basin or filling it, and also the construction of an intercepting sewer. 6. I would also advise that steps be taken to protect Tivoli Lake from drainage waters, which now find their way into it to some extent. 7. I would further say that I consider the water of the river so free from any objectionable contamination, that the whole question seems to me to be one of practical economy for the taxpayers. If there were an equally available supply of water from a source against which no one, however biased, could sug- 35 gest a suspicion (I know of no city that lias a supply oi water which does not at times arouse the alarmists), then I would say, as a matter of sentiment, to silence if possible all com- plaints and arguments, abandon the river. But it would be very foolish to abandon a never-failing supply of wholesome water, which can be had by simply pumping, to go to large expense, simply as a matter of sentiment, to prevent a few persons from saying disagreeable things about the quality oi the water. Besides, if water were brought from some lak< . a new class of troubles would result. Lakes are very liable to be invaded, at certain seasons of the year, by abundant growths of vegetable or animal matter, which communicate color, taste, and odor to the water which are very offensive. Almost every city in the country that is supplied by lake water has experienced this difficulty. In studying this subject (to use the language of Dr. Leth- eby, already quoted), I have been " anxious, in dealing with a question of so much public importance, that none of the facts should be perverted, and that no hasty or ingenious hypothesis, without solid foundation, should take possession of the public mind. In the conduct of inquiries like fchis, there should be a calm, a full, and a candid examination of the facts ; — we should endeavor to study the phenomena in a philosophical spirit, and apply to them the tests of sound induction. Hash opinions, boldly asserted and tenaciously held, though they may force themselves on public attention, rarely lead to useful results ; and while they have their hold on the popular mind they seriously hinder the progress of real knowledge." Very respectfully youi*6, C. F. CHANDLER. lEx ICtbrtB SEYMOUR DURST When you leave, please leave this book Because it has been said "Ever'tbinQ comes t' bim who waits Except a loaned book." Avery Architectural and Fine Arts Library Gift of Seymour B. Durst Old York Library