; 1971 
 
 !5 A75 
 >py 1 
 
 Romance of Big Business Series 
 
 NUMBER FOUR 
 
 Written for the 
 Children of ilmerica 
 
 11919 
 
 
 ARMOUR'S BUREAU OF AGRICULTURAL RESEARCH AND ECONOMICS 
 R. J. H. DeLOACH, Director UNION STOCK YARDS, CHICAGO, ILL. 
 
c 
 
 ■ "■' I ix I 
 
 Romance of Big Business Series 
 
 NUMBER FOUR 
 
 WRITTEN FOR THE 
 CHILDREN O^AMERICA 
 
 o 
 
 Armour's Bureau 
 of Agricultural Research and Economics 
 
 R. J. H. DeLOACH, Director 
 
 Union Stock Yards 
 Chicago, 111. 
 

 >, 
 
 I It 
 
 Copyright i9I9 
 Armour and Company 
 
 MAV -8 1919 
 ©CI.A516521 
 
 /I' 
 
 <fl 
 
 *-,* 
 
 •^45 
 
Where is the Cat Farm? 
 
 COMEWHERE there is a source for the huge supply 
 of strings made for numberless musical instru- 
 ments, for the racquets of an army of tennis players, 
 for the fine, strong ligatures which surgeons use when 
 they make a neat seam in a human body, for all the 
 different things we have always called "catgut." 
 
 It is too bad to spoil a trade name so old that no 
 one knows just where it came from; but really, cats 
 have no more to do with the manufacture of "catgut" 
 than they have with the making of a "catboat" or the 
 materials in a "cat-o'-nine-tails !" No more than sand 
 has to do with "sand" paper. 
 
 If all the household pets and all the homeless 
 alley-cats in the world were caught and killed they 
 would still have nothing to do with the manufacture 
 of catgut, for there is not an atom of their poor little 
 bodies that is ever used in 
 making it. 
 
 Instead of cats it is Mary's 
 little lamb and the rest of the 
 sheep relatives which furnish 
 the material for all the cat- 
 gut in use today. 
 
 No one seems to know 
 who first discovered that the 
 thin, rubber-like material of 
 animal intestines was the 
 finest thing in the world for 
 
 ,-* 
 
MUSICAL STRINGS 
 
 musical strings, but they have been in use for hun- 
 dreds and hundreds of years. 
 
 So far as the records go, the first violin strings 
 were made in Italy, the home of music, and this sheds 
 a very little light on the name. There was a time 
 when a violin was called a "kit," and the strings for 
 it were called "kit-strings." As these strings were 
 sometimes of wire and sometimes made from intestines, 
 it is easy to suppose that the difference was shown by 
 calling one of them "kitgut." More than likely our 
 present name of "catgut" has come from this, though 
 no one really knows. 
 
 For a good many hundred years the making of 
 catgut was done almost entirely in Italy and they had 
 no trouble in supplying all the musical instruments 
 with the strings needed. 
 
 But as the world grew richer and better and the 
 people everywhere began to understand music and art 
 and literature, more musical instruments were de- 
 manded and more catgut was needed for them than 
 the small factories of Europe could 
 secure the intestines to supply. 
 
 So, in the latter part of the last 
 
 century, the manufacturers in the old 
 
 countries began to call on America, 
 
 with its great packing industries, to 
 
 furnish them with the materials 
 
 for making their musical strings. 
 
 In this way great quantities 
 
 of sheep intestines were shipped 
 
 to the catgut factories in Europe, 
 
 made into strings there, and 
 
 shipped back to be used in this 
 
MUSICAL STRINGS 
 
 country, with freight and express charges for both 
 journeys, custom house duties, packing, and a good 
 many other items of expense added to the first eost 
 of them. 
 
 It did not look like good business to Armour and 
 Company or fair to those who bought, so, a few years 
 ago — in 1912, to be exact — they decided to manufacture 
 their own supplies of intestinal material into the 
 finished product, instead of sending them to Europe 
 to be made up and returned. 
 
 In the beginning only a small factory was built 
 but the very best of machinery was installed and 
 skilled workmen and managers placed in charge. 
 
 Little by little the American string, made in the 
 little Armour factory from the finest materials while 
 they were in the best possible condi- 
 tion, began to find favor. Some great 
 players who tried them said they were 
 better than any string made anywhere 
 else and it was not long un- 
 til players generally began 
 the use of strings made in 
 this country. 
 
 So the little business be- 
 gan to grow up and act 
 like a big business and to 
 have all the orders it could 
 fill. 
 
 Then came the great war 
 and in a little while no mu- 
 sical strings and not much 
 else could be brought from 
 Europe. 
 
MUSICAL STRINGS 
 
 So they used Armour strings and found that if 
 there was any difference the American string was the 
 better of the two — and suddenly the demand was so 
 great that the little catgut factory grew up with a rush 
 and became a big catgut factory, which is still growing. 
 
 From a Ba-a Sheep to an E-String 
 
 When a sheep is dressed part of the intestines are 
 sent to the sausage casing department to be made into 
 containers for different kinds of sausage, but the 
 small intestine, which is about the size of a lead pencil, 
 and eight yards long, is sent to the string factory to 
 be manufactured into various products, such as musical 
 
 instrument 
 strings, surgical 
 ligatures or cat- 
 gut, tennis rack- 
 et strings, clock 
 cords, loom gut, 
 belt lacings, 
 belting and the 
 like. 
 
 First they are drawn over dull blades which scrape 
 off all shreds and foreign matter, then they go to more 
 baths — both chemical and plain — until they are thor- 
 oughly clean and transparent. 
 
 After the splitting of the intestine, which is done 
 by a skilled workman who draws the moist, slippery 
 material over a wooden finger-shaped instrument, in 
 the center of which there is a sharp blade vertically 
 set, the little strands are again cleaned by placing 
 them in a chemical bath in a machine that looks some- 
 
MUSICAL STRINGS 
 
 thing like a washtub with many wringers attached, 
 through which they pass many times. 
 
 Several of these slender, elastic strands are woven 
 into one musical string of ordinary size and the spin- 
 ning of each one requires the art of two skilled and 
 careful men who know exactly how many turns the 
 old-fashioned spinning wheel must make and just how 
 the wet strands or half-guts must be fed to the string 
 so it will be of even size and strength. 
 
 After the spinning the strings are put on frames in 
 the drying room and left 
 until they are thoroughly 
 dry and "seasoned/' which 
 takes from ten to sixteen 
 days. 
 
 They are rough and un- 
 finished-looking when they 
 come off the frames, so the 
 skilled worker comes in /j 
 again, stretches them ona / 
 machine which keeps them 
 turning while he goes back 
 and forth, from end to end, 
 polishing them with sand 
 paper and chalk until they 
 are smooth and glistening. 
 Hand polishing is also used 
 extensively. Just as the 
 wool of some sheep is differ- 
 ent in color from that of others, so the intestines, too, 
 vary in shade. But while some are lighter and some 
 are darker, color makes no difference in either quality 
 or tone. 
 
 Cleaning 
 
10 
 
 MUSICAL STRINGS 
 
 If the string is to be artificially colored, as is desir- 
 able for some uses, such as ukulele, harp, and tennis 
 strings, this is done after it leaves the spinning-wheel 
 and before it goes to the drying frames. 
 
 After the drying and polishing there is little more, 
 in a manufacturing way, for them to undergo; but there 
 
 are still some delicate 
 processes of testing 
 them for strength and 
 size, then they are cut 
 into necessary lengths, 
 coiled, inserted in en- 
 velopes, boxed, labeled 
 and sent to market. 
 
 This, in short, is 
 the method of making 
 all strings for musical 
 instruments, but of the 
 hundreds of little deli- 
 cate processes which 
 make the difference be- 
 tween the many kinds 
 and grades put on the 
 market, very little can 
 
 be explained in a general story without becoming 
 
 tedious and technical. 
 
 All of these strings are made in different sizes and 
 of different grades to meet the requirements of the 
 trade. 
 
 The harp strings are, perhaps, the most wonder- 
 ful of all, for sometimes a hundred or more of the 
 tie gut strands are spun into one string. 
 
 Splitting 
 
MUS ICAL STRINGS 
 
 11 
 
 And, if it requires art and skill to weave a dozen 
 strips into one small string, it is easy to see what it 
 means to spin a hundred strands into a perfect string, 
 only a little larger, that is equally strong and close 
 throughout its whole length. 
 
 When one listens to the full, mellow tones of a harp 
 as it responds to the touch of gifted fingers, it is diffi- 
 cult to realize that it would be utterly impossible 
 without the help of hundreds of little woolly sheep, 
 who live their lives and lay them down in order that 
 the world may be better and happier! 
 
 Then, in addition, 
 there are strings that 
 are colored, strings that 
 are treated so as to 
 make them as nearly 
 moisture-proof as any- 
 thing of the sort may 
 be and strings that are 
 made to stand the dry 
 weather. 
 
 Then there are the 
 drum-snares — which 
 are the little families sorting 
 
 or sets of strings drawn across the drum head to pro- 
 duce the desired volume of sound. 
 
 The drum heads, too, are a packing house product, 
 for these are made of calfskin, goatskin, or buck. 
 
 Naturally there are different sizes of drums, so 
 there must be all sizes of heads for them — little drum 
 heads and big drum heads and medium drum heads — 
 and all these must be made in different weights 
 
12 
 
 MUSICAL STRINGS 
 
 and grades and even, sometimes, of different materials. 
 
 And there is the problem of tennis strings. 
 
 Many of you know a great deal about this and can 
 talk wisely of the relative merits of "domestic" and 
 "imported" and "Oriental" brands. 
 
 But did you know that the heavy "Oriental" 
 string which looks so strong and durable and costs so 
 little, is not made of gut at all ? 
 
 It is "Oriental" all right, for it comes from Japan, 
 but there it is made of heavy sinews and tendons 
 
 which have no life or 
 
 elasticity, instead of 
 the responsive intes- 
 tinal material which 
 has a quality only 
 to be described by 
 the word "resilient." 
 
 There is as much 
 difference between 
 the tennis string 
 made of sheep intes- 
 tines and the one 
 made of sinews, as 
 there is between a 
 rubber ball and one 
 made of wood. One 
 
 seems "alive" to the ball when it strikes it, the other 
 
 is dead in its frame. 
 
 But, at the string factory of Armour and Company, 
 where there is such a quantity of high-grade material, 
 tennis strings are made from intestines only, and 
 sinews and tendons are used in making glue. 
 
 Spinning 
 
 
MUSICAL STRINGS 
 
 13 
 
 Many other things, mostly for mechanical and 
 manufacturing uses, are made from the slender intestine 
 of the sheep, but the most interesting of all are the 
 fine ligatures or threads which surgeons use for taking 
 stitches in the human body. 
 
 It is only a few years since these were made of linen, 
 or cotton, or even of fine wire — and then it was almost 
 as much pain and 
 trouble to take them 
 out as to put them in. 
 But the delicate "gut" 
 ligature, made from the 
 strong, silky-smooth 
 side of the narrow 
 sheep intestine, is taken 
 up or absorbed by the 
 flesh of the patient as 
 he recovers, so that by the ~^= 
 time he is quite well the stitches 
 have all disappeared. 
 
 These required an endless amount of study and 
 years of experimenting with different methods of 
 making and finishing, before they became the satis- 
 factory ligature the surgeons know today. The first 
 ones, used in an experiment on guinea pigs which had 
 been mercifully chloroformed until they knew no pain, 
 absorbed too soon because they were not quite hard 
 enough, and the blood absorbed them too quickly. 
 
 The next ones went to the other extreme and were 
 so firm that they did not absorb at all and had to be 
 taken out the same as linen, or wire ligature. 
 
 yj[L \ 
 
 Polishing 
 
14 
 
 MUSICAL STRINGS 
 
 But the doctors and scientific men, who were study- 
 ing every means of relieving pain then — this was a 
 great many years ago — the same as they are now, 
 believed they were on the right track and finally a 
 "gut" ligature, as nearly perfect as it is possible to be, 
 was ready for use and is one of the products of Armour 
 
 and Company. These ligatures, like other 
 
 strings, are put up in differ- 
 ent ways, some being finer 
 than others and some being 
 sealed in small glass bottles 
 holding an "antisep- 
 tic* ' fluid, so that they 
 may be used without 
 further preparation, or 
 sterilizing if there is a 
 sudden need, an emer- 
 gency call, where only 
 quick action will save life. 
 
 These, too, are gauged for size, tested for strength, 
 numbered and labeled, before putting them on sale. 
 
 Sorting and 
 Packing 
 
Making an Ally of Nature 
 
 Knowledge and patience and skill are needed for 
 the making of all these things, but far, far more of 
 these are needed to search out and separate the natural, 
 helpful things hidden in the organs and glands of a food 
 animal's body. 
 
 Just as the heart and lungs of an animal do the 
 same work that they perform in a human body, so the 
 wonderful and delicate glands do much the same work 
 in both. And because, oftentimes, these glands are 
 but little understood and their work in both animal 
 and human is very much of a mystery, there seems 
 always a wide field for study and much, very much, 
 
 still to be learned 
 
 -hi ii'- li ii ».j 
 
 ~* L. i! i M 
 
 - — >. tv^Jl \i > I 
 
 P"ffl.:| 
 NhHhi ii 
 
 from them that 
 will benefit the 
 world. 
 
 Much as 
 has been 
 done in this 
 way in the 
 last few 
 years, there 
 is still much 
 to be learned 
 and no one 
 can tell what 
 secrets still 
 lie hidden in 
 the bodies of 
 
 Selecting and Preparing Glands 
 
16 
 
 PHARMACEUTICALS 
 
 food-animals nor what benefits they will yet bestow 
 on mankind. 
 
 But where, a few years ago, all this fertile field of 
 research went to the waste pile and was lost, now 
 everything is saved and the light of science has done 
 wonders in redeeming it. 
 
 In this way it has been learned that sometimes, 
 when a gland in a human body becomes sick or tired, 
 the same one in a healthy animal's body is able to 
 give up its strength and power in a helpful way. 
 
 Sometimes a little gland manufactures or "secretes" 
 as we say, a fluid of some sort that is necessary to 
 health. Perhaps even the doctors and scientists 
 cannot tell just what this fluid is or why it is so needful 
 —they only know that it is. Then, if something happens 
 to the tiny gland and it can no longer manufacture its 
 helpful product, illness results and no one knows just 
 what to do or how the gland can be renewed and made 
 to carry on its work again. 
 
 So the food animals have been called on to give up 
 their glands — sometimes working in one way, some- 
 times in another, but 
 always with the 
 thought of helping the 
 sick or useless one in a 
 human body. 
 
 These things can 
 hardly be called "medi- 
 cines," any more than 
 a roast or a chop would 
 be, for they are almost 
 always used to supply 
 
 n *'h 
 
 Pepsin Drying 
 
PHARMACEUTICALS 17 
 
 something that the human body lacks and that the 
 food animal can give — just as it gives food and other 
 things that men and women need. 
 
 Some of these things have been known and made 
 in small quantities for a great many years but, until 
 the packing houses, with their great numbers of 
 freshly-killed animals, began the manufacture of them, 
 the demand was always greater than the supply. 
 
 Others are comparatively new and require such 
 huge quantities of material for study and experiment 
 and for manufacture, that they are possible only where 
 large numbers of animals are killed. 
 
 There are groups of such remedies, all made from 
 the same glands, some of them being the simplest 
 preparations and others made by separating each 
 tiny particle from those that differ from it until all 
 the different atoms are placed by themselves and each 
 class is ready to do a work of its own. 
 
 If you could take a loaf of bread and separate it 
 by chemical processes, into flour and milk and sugar 
 and salt and yeast, you would be doing, as nearly as 
 I can explain it, what the chemists do to a gland 
 they know contains several different "ingredients" 
 or what they call "active principles. " 
 
 Sometimes they take these "active principles" and 
 put them together again in a different way to make 
 something else the human body needs — just as you 
 might take some of the things you found in the loaf of 
 bread and make them into cake or muffins. 
 
 Many, many years of study and hard work have 
 gone into every preparation that is finally accepted 
 by doctors and surgeons — hard work, not only by 
 
18 
 
 PHARMACEUTICALS 
 
 those at the laboratories of Armour and Company, 
 but by brilliant men all over the country. 
 
 However, as Armour and Company furnishes so 
 much of the material for all this study and experiment 
 and has the means of manufacture, it follows that the 
 final results are largely due to them, though in many 
 cases they consider themselves greatly indebted to 
 others for the work that has been done. 
 
 Some of these things are manufactured from 
 glands so tiny that thousands of cattle and more than 
 a hundred thousand sheep are needed to make a single 
 pound, so their manufacture is not possible anywhere 
 but at the largest of packing plants, and the world 
 knew nothing of them until the big plants, with their 
 great numbers of food animals, could develop them. 
 
PHARMACEUTICALS 19 
 
 A Peep at the Preparations 
 
 A wonderful "group" of remedies is known as the 
 "suprarenal preparations" and they are made from 
 small glands just above the kidneys of the sheep. 
 (The name itself shows the origin of these remedies 
 for "renal" means kidney and "super," above. "Supra- 
 renal" — "above the kidney.") 
 
 One of these called "suprarenalin" is a powerful 
 heart stimulant and requires the glands of 135,000 
 animals to make a pound of it. Under such circum- 
 stances it cannot help being expensive, costing, some- 
 times, $5,000 a pound, but fortunately only a little is 
 needed for a dose. 
 
 Thousands of lives, especially those of little chil- 
 dren who have become weakened by scarlet fever or 
 diphtheria, have been saved by suprarenalin. 
 
 At the base of the brain in all animals — in man, as 
 well as in the lower orders — is a little gland known as 
 the "pituitary body" and this is the source of another 
 group of rare remedies used for relieving suffering and 
 giving strength where weakness or "shock" is the 
 greatest danger. 
 
 A little gland in the throat of a sheep, known as the 
 "thyroid" gland, is quite similar to one in the throat 
 of a human being. Sometimes the one in the human 
 throat becomes sick and sometimes a child is born 
 whose thyroid gland is imperfect and cannot do its 
 work. 
 
 Not a great many years ago there was no help in 
 such cases, but now the gland from the sheep fs made 
 to help and sometimes to cure. 
 
20 
 
 PHARMACEUTICALS 
 
 When a child is born with this gland in a useless 
 condition it is sometimes afflicted in various ways and 
 sometimes its brain cannot grow or guide its body. 
 We used to call such children "idiots," "mental de- 
 fectives," or "feeble-minded." 
 
 Today they are very often helped and sometimes 
 made as well as other children by giving the remedy 
 made from the sheep thyroid because it supplies the 
 thing lacking in their own bodies, and because their 
 trouble was not a feeble mind but a feeble thyroid 
 gland, whose mysterious secretion or fluid is necessary 
 to every one of us. 
 
 Such children must almost always take a little of 
 the thyroid remedy from time to time, so as to keep it 
 circulating in 
 their bodies, 
 just as their 
 own thyroid 
 glands would 
 do if they had 
 them in per- 
 fect condi- 
 tion. 
 
 This is not the 
 only use of the 
 thyroid group, 
 however, for they 
 are used in many 
 ways for grown 
 people, as well as 
 for children. 
 
 Another throat n^ 
 gland is the "thy- 
 
 Condenser 
 
PHARMACEUTICALS 
 
 21 
 
 mus" and this is found in all young animals — the human 
 young, too, — but disappears in most of them when they 
 are grown. 
 
 Because this gland is so closely associated with 
 growth it was soon learned that if it was imperfect or 
 its work was interfered with in any way, growth and 
 development stopped, so the remedies made from 
 the thymus of the sheep are helpful to children who 
 
 do not grow as they should, whose bones are soft, 
 whose food seems to do them no good. 
 
 Like the thyroid remedies, this group has its uses 
 for grown people, too. 
 
 During the great war many lives were saved by a 
 preparation made from the brains of cattle, which 
 would check all ordinary bleeding or hemorrhage from 
 wounds or operations. 
 
22 
 
 PHARMACEUTICALS 
 
 To make this the cattle had to be killed in a special 
 way and the brain tissue handled with the greatest 
 care and skill. So helpful was it, that it is impossible 
 to even guess how many brave boys were saved by 
 this alone. 
 
 as rare 
 
 One of the medicines that is no longer spoken of 
 because it is well-known and has been made 
 a long time, is "pepsin" which helps in the digestion of 
 food and is found in the lining of hogs' stomachs. 
 
 Physicians use it to relieve dyspepsia and other 
 stomach troubles. 
 
 "Pancreatin," another remedy long known to 
 physicians, is made from the "pancreas" or sweetbread 
 found inside the hog and this is used to put in the food 
 of delicate babies and of invalids so it will digest easily. 
 
 It is different from pepsin, but its power to help in 
 the digestion of food seems just about as great after 
 it has been taken as medicine as when it worked on the 
 food given to the animal in which it was found. 
 
 Neither pepsin nor 
 pancreatin had been 
 manufactured to the best 
 advantage when Armour 
 and Companybeganmak- 
 ing them, largely be- 
 cause the business was 
 small and those engaged 
 in it were compelled to 
 gather such materials 
 as they could, here and 
 there. But, like many 
 other things, as soon as 
 
PHARMACEUTICALS 
 
 23 
 
 Armour and Company, with their unlimited supply 
 of the best materials to choose from, entered the field, 
 the quality of both of these improved, for, by putting 
 out a high standard of goods themselves, they com- 
 pelled others to do so, too. 
 
 Another useful product of the food animal is 
 oxgall, the greenish fluid in the gall-bladder, near the 
 liver. 
 
 This is made into a medicine in tablet form, but 
 it has more manufacturing uses than it has medical. 
 Artists use it in mixing their paints to make them 
 "flow" well and yet to bind or blend all the different 
 ingredients together. It is also used in making indelible 
 inks and pencils and is put into fine varnishes. 
 
 As it has a "soapy" quality it is much in demand by 
 cleaners and dyers for many purposes. 
 
 Still another, which is more food than medicine, is 
 
 the "rennet" which 
 comes from the stom- 
 achs of calves and is 
 used in making cheese 
 because of its power to 
 digest milk. 
 
 One form of rennet 
 is "junket," used for a 
 dainty dessert in almost 
 every family and as an 
 easily digested food for 
 children or for those 
 who are ill. 
 
 Perhaps, strangest 
 of all, is the use to 
 
24 
 
 PHARMACEUTICALS 
 
 which the small, pebbly stones, sometimes found in 
 the gall-bladder and known as "gall-stones," are put. 
 
 These are shipped to Japan where those who are 
 superstitious or who believe in "signs" or "charms" 
 buy them and carry them about in their pockets to 
 bring them good luck, in much the same way as people 
 in this country sometimes hang a horseshoe over the 
 door or carry a rabbit's foot around with them. 
 
 And in addition to these more important things, 
 there are a large number of lesser ones made by 
 Armour and Company. 
 
 Some of these are in constant demand, some are 
 seldom used, but there are about fifty in all which 
 come from the interior organs of cattle, sheep and 
 hogs to make the world healthier and happier. 
 
 Even at that, the science of "animaltherapy" or 
 "organotherapy" as this work is called, is only begin- 
 ning and every year will see more and more wonderful 
 discoveries made by those 
 who study the vital or- | 
 gans of both lower ani- * 
 mals and human beings, 
 so that suffering may be 
 lessened and disease 
 overcome. 
 
 All these things, too, 
 have their effect on the 
 price of meat and lard, on 
 sausage and ham. For 
 here again is an income 
 that reduces the cost of 
 handling a food animal 
 
 pealing Tubes 
 
PHARMACEUTICALS 
 
 25 
 
 and takes a certain amount off the price we would 
 otherwise pay for a steak or roast. 
 
 Even during the great war, when all Europe was 
 calling on the United States for meat and meat 
 products, prices did not rise as much as on many other 
 things which were in less demand, and good meats were 
 always within the means of even those workers who 
 performed heavy, unskilled labor and so received 
 the lowest wages. 
 
 In some countries the unskilled laborers 
 do not have meat of any sort very often and 
 when they do it is usually horse-meat or — 
 sometimes — even mule-meat. 
 
 Those who work in this country can have 
 the best of food, but not many of us realize 
 that it is the putting of every part and par- 
 ticle of a food animal to its highest use that 
 helps to keep the price of meats within reason 
 
 and makes the American workman envied the world 
 
 over. 
 
 Surgical 
 Ligature 
 
Announcement to Teachers 
 
 fJlHIS little booklet has been prepared to meet the 
 •*■ urgent demands of the public for a better under- 
 standing of the business that it is designed to por- 
 tray. It has been published for free distribution 
 among teachers, and arrangements have been made 
 with the publishers whereby classes will be furnished 
 at the actual cost of paper and printing, which is 
 approximately three cents a copy. 
 
 This series of booklets will comprise six num- 
 bers when completed, as follows : 
 
 Book I — Dreams That Came True. 
 II— The Story of a Soap Bubble. 
 Ill— The Story of Glue. 
 IV— The Story of Musical Strings 
 and Pharmaceuticals. 
 V— Feeding the Farm. 
 VI— The River of Food. 
 
RKQ NO 410014 
 
LIBRARY OF CONGRESS 
 
 021 469 1 
 
 06 1