BUREAU OF ANIMAL INDUSTRY. 129 



volume of products was prepared al licensed establishments, and 

 the manufacturers made praiseworthy efforts to prepare these prod- 

 ucts in a more satisfactory manner. 



The bureau has endeavored to bring about uniformity in the names 

 of veterinary biologies as far as possible and also to have the manage- 

 ment of licensed establishments clearly indicate on the labels of 

 containers of the products the nature of the contents, the diseases 

 or conditions for which the product is recommended, and simple, 

 accurate statements concerning the dose in each instance. 



HOG-CHOLERA VIRUS AND SERUM. 



Virus and serum for use in the prevention of hog cholera form a 

 large part of the volume of products supervised. The number of 

 tests made to determine the purity of hog-cholera virus was 1,352. 

 The number of tests made of batches of antihog-cholera serum was 

 5,368. There were inspected and admitted to the premises of 

 licensed establishments 263,364 hogs and 2,814 calves, a total of 

 266,178 animals. There were rejected by bureau inspectors when 

 presented for admission, including animals rejected on tuberculin 

 test, 720 hogs and 7 calves. 



The amount of hog-cholera virus collected for hyperimmunization 

 was 66,157,939 cubic centimeters. The amount of hog-cholera virus 

 collected for simultaneous use was 9,230,457 cubic centimeters. The 

 amount of antihog-cholera serum collected was 271,402,530 cubic 

 centimeters. Of the foregoing products, the following were destroyed 

 when collected: Ho^-cholera virus for hyperimmunization, 4,414,191 

 cubic centimeters; nog-cholera virus for simultaneous use, 303,658 

 cubic centimeters; antihog-cholera serum, 2,488,661 cubic centi- 

 meters; loss by refining, 71,995 cubic centimeters. 



Marked interest is being shown by manufacturers in the prepara- 

 tion of clear, sterile antihog-cholera serum as distinguished from the 

 ordinary defibrinated blood serum. This product is now being pre- 

 pared in large quantities by several licensed establishments. 



EXPERIMENT STATION. 



The work of the experiment station at Bethesda, Md., in charge of 

 E. C. Schroeder, superintendent, relates mainly to the study of dis- 

 eases of animals, and has consisted, as in previous years, of inde- 

 pendent investigations, investigations in cooperation with other di- 

 visions of the bureau, and the provision of facilities for other divisions 

 to make observations on domestic animals under normal farm and 

 field conditions. 



iNFi-CTIOUS ABORTION DISEASE OF CATTLE 



The insidious, chronic character of infectious abortion disease mili- 

 tates against the rapid discovery of the facts on which its control 

 and eventual eradication depend. During the year the earlier dis- 

 coveries have been confirmed but no radically new ones made. 



The available evidence regarding the habitat of the abortion 

 bacillus indicates that it does not currently multiply or maintain 

 itself elsewhere in the bodies of cattle than their udders and pregnant 

 uteruses. In the nonpregnant uterus of an infected cow abortion 

 bacilli persist from a few days to a few weeks after parturition or 



