94 AGRICULTURAL APPROPRIATION BILL, 1924. 



Hog cholera research. — It is known that this work has resulted in a saving 

 of many millions of dollars to the farmers of the country, and it is h^lieved 

 that it lias been largely responsible for increasing hog production after it 

 had reached a low ehh about the time antlhog-<'h<ilera serum was developed by 

 the bureau. 



Inrcstif/fitious of dijtH ntid dininfectantft. — As a result <>f this work thf in- 

 spection and (luarantiiie work, as well as ti<'k eradication work, has been 

 placed on a firmer basi.s. Means liave been provided by the bureau for test- 

 ing the strength at any time of the dip in vats ready for use. 



lurculitifilionn of iinatx. — liesi^arch work has been directed toward studies 

 of the changes in fresh beef during cold storage, the effect of .salting, chemical 

 studies of the nutritive value, vitamin content, etc. 



The production of tuhrrciiliu. — The total amomit of tuberculin produce«l for 

 the use of its inspectors in the tiehl during the fiscal year 19li2 amounteil in 

 round numebrs to 7.830,011 do.ses. at a cost of .S24.748. Tlie tuberculin would 

 have cost api)roxiniately .$2()0,(KX) if the bureau bad been obliged to buy it at 

 present market i)rices. 



The field inrestii/ationft i)i the control of round irorm-'i. — In swine, stomach 

 worms in sheep, and warble infestation among cattle are being extended. 



Jnrestif/dtion af aninial abortion. — This work includes a study of the etiologj' 

 of the disease, the development of methods of control, tlie difference in the va- 

 rious microorganisms responsible for abortion among domestic aninuds; an<l 

 the various chemical agents for the suppression of the di.sease. 



Investigation of tuherculositi of aninialfi. — This work includes the study of 

 the causes on which the spread of tuberculosis among animals depends, studies 

 covering the tul)erculin test, and other tesis for tuberculosis, studies of the 

 different types of the tubercle bacillus, their economic significance, etc. 



Supervision of plants wliich produce biological products, cspcciullii hog- 

 cholera- scrum and virus. — r)uring the year 1921 there were producetl 476,- 

 955,95.5 c. c.'s of antihog-cholera serum and 26.2.52.175 c. c.'s of virus. The 

 indications are that 9()(>.(Mi(».(K)0 c. c.'s of the seruii^ will be pnMhiced during 

 the present year. 



Butter and by-products. — This project is designed to increase the efficiency 

 of butter making by the economic utilization of by-products, including the 

 production of different kinds of cheeses and albumen products. 



Condoised milk investigations. — Studies are being made of the factors which 

 control the connnerclal (piality of condensed and evaporated nulk. 



Nutrition of dairg cons and .secretion of milk. — The object of this stutly is 

 to learn more of the process by which the cow converts the nutrients of the 

 feed into milk. 



Dairg sanitation research. — The object is to study the sanitatiim of city 

 milk supplies, the factors influencing the commercial cpiality of nulk, am! 

 devise means for j)roducing and handling milk of superior quality. 



Research in animal genetics. — Exhaustive experiments are being conducte<l to 

 obbiin more definite information concerning the iirinciples of heredity. 



The development of an American breed or horses. 



The reliabilitation of the Morgan breed of horses. 



A 2(l-year experiment to determine how the ndlking qualities of cattle are 

 transmitted. 



Detailed exjieriments on inbreeding of cattle and swine. 



Development of a breed of sheep about e<nndly valuable for w<»ol and meat. 



Metho(ls of making Swiss, Roquefort, Caniembert. and similar foreign cheeses. 



A study of the physiology of milk secretion. 



('ontinuons woi'k is being done on stock-poisoning jdants. This problem is 

 e.specially important on western ranges. 



A study of soft pork to ascertaiiy lh»' causes and means of prevention. 



The bureau is engaged in many other i>roblen\s which are of scientific and 

 economic importance, and i)rogress is likewi.se being made in their solution. 



SAL.VRIFS. 



Doctor M()iii,i:i{. Mi-. Cliaiiimm, the liist chaiijro afTeotiiijr the 

 Jiiii-eaii of Animal Iiidii.strv is on pajze 47 in tlu* statutory roll. 

 There has been transferred fioin the statutory roll of the i>uroan to 

 the statutory roll of the Secretary one editor and compiler at $'2.'jr)(); 



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