988 EXPEEIMENT STATION RECORD. 



products is tabulated by the author. All of the products, including 

 the expressed juice and the milk before separation, were used in inocu- 

 lating guinea pigs, with the result that a virulent type of tuberculosis 

 was produced in every case. Pigs fed with skim milk and buttermilk 

 develoi^ed generalized tulierculosis within ♦! months. The author 

 believes that the milk of tuberculous cows may contain the tubercle 

 bacillus and that this organism may find its way into all the milk 

 products. 



A number of experiments were conducted in feeding to pigs tuber- 

 culous meat in the form of glands. About 50 per cent of the pigs 

 fed with such material developed tul)ercu]osis. The author gives a 

 detailed histor}" of tuberculosis in the college herd since 1889, when 

 the animals were first examined. All animals which gave a reaction 

 to tuberculin on more than one occasion were subsequently shown to 

 be tuberculous. The records of the herd show that the disease is 

 seldom or never transmitted directh" to offspring but that infection of 

 calves usually occurs after a year or two. The author recommends 

 that milk should be pasteurized b}" heating momentarily to a tempera- 

 ture of 85° C. or by sul)jection to a temperature of 68 to 70° C. for 

 20 minutes. The author's suggested method for managing tuberculosis 

 is essentially that of Professor Bang. 



Ne-w procedures in vaccination against symptomatic anthrax 

 of cattle by association of an immunizing serum and virus, 8. 

 Arloing {Compf. Rend. Acad. ScL ParU^ 131 [1900), j\o. o, jjjj. J19- 

 323). — During experiments on sheep, it was found that an active 

 immunity could be produced by inoculating with a dose of serum, 

 followed by a dose of the fresh virus, but that it was impossible to rely 

 upon analogous results from injections with a mixture of the virus 

 and serum. When experiments along the same line were extended 

 to cattle, it was found that more satisfactory results were obtained by 

 inoculation Avith the mixtures. A certain amount of resistance was 

 conferred upon cattle by inoculation with 1 cc. of serum mixed with 

 0.2 cc. virus, or with a mixture of 0.5 cc. serum and 0.2 cc. of virus. 

 It is possible, therefore, to imuuinize cattle against blackleg by means of 

 inoculation wath the serum and virus, either separateh' or in mixtures. 



Immunity to symptomatic anthrax after the injection of a pre- 

 ventive serum and natural virus, either separately or in mixtures, 

 S. Arloing {('ompt. Rend. Acad. Sci. Paris., 130 (1900), jVo. lo,jpp. 

 99 1-99 Jf). — In a previous communication the author demonstrated the 

 fact that blood serum from a strongly immunized cow confers a passive 

 immunity upon sheep. The immunity produced by the injection of 

 serum is of short duration. In the author's experiments it had entirel}^ 

 passed away b}' the eighth day. The immunity produced by serum 

 may be strengthened and rendered moi"e durable by subsequent 

 inoculations with a lethtd dose of fresh virus. 



