VETERINARY SCIENCE AND PRACTICE. 



691 



effect is exercised in a very desultory manner. Sometimes it appears 

 to cure, sometimes to retard the disease, and in others to hasten it. 

 Illustrative of this last fact, the case is cited of a cow that began to 

 show signs of failing health and after the ninth test was slaughtered 

 and found more or less badly infected in nearly all the organs. In 

 another instance a cow that had received 12 injections appeared at the 

 time of writing none the worse. 



Relative to the germ content of milk, the fact is brought out that the 

 udder is not always affected, even in badly tuberculous animals; nor 

 are the four teats affected in the same degree. It is thought very likely 

 that a few germs may remain in the milk ducts after milking and mul- 

 tiply greatly during the next 12 hours. This would account for the 

 fact that they are in greatest abundance in the first spurts drawn. 

 The greatest average number of germs per drop found in the tests was 

 640, the lowest 18. In the former case germs were found in great num- 

 bers in milk from each of the teats and in every spurt. In the other 

 cases noted, their occurrence in relation to the number of the spurt 

 and to the teat was more or less irregular. The number of germs to 

 the spurt and the relation of this number to the number of the spurt 

 in the series of spurts is well shown by the following table, teat B and 

 C representing the two hind teats: 



Number of germs per drop of the milk of cow 26. 



Teat B. 



Teat 0. 



Number of spurt. 



One 



Three 



Five 



Seven 



Nine 



Eleven 



Thirteen. . 

 Fifteen . . 

 Seventeen 

 Nineteen. 



Amount „„''„' t Number 

 si'urt. »'» " per drop. 



Cc. 



('<: 



5 

 18 

 36 

 49 

 65 

 85 

 103 

 114 

 138 

 155 



10. 540 



4,420 



2, 380 



1. 360 



2,550 



480 



220 



520 



440 



330 



Total 

 i amount 

 mea « h in spurts °'««™ 



snort. , " iii'i-rlfim 



drawn. 



Amount 



spurt. 



Number 



pci- drop. 



Cc. 



Ce. 



11, 900 



2.040 



1,530 



1,140 



930 



740 



720 



940 



1,240 



620 



The suppression and prevention of tuberculosis of cattle and its relation 

 to human consumption (pp. 263-285). — This is a general discussion of 

 the subject. The death rate from the disease, both human and bovine, 

 as shown by statistics from various countries is given, as well as a dis- 

 cussion of what constitutes tuberculosis, its cause, degrees, symptoms; 

 milk as a carrier of the germs, the tuberculin test, and an account of 

 Bang's method. 



Laboratory tests of creolin as a disinfectant, F. S. Roop ( Virginia 

 Sta. Bui. 63, pp. 47-52). — In the experiments with this oily coal tar 

 product, Staphylococcus pyogenes aureus — the virulence of which had 

 been tested by its producing death in a rabbit in 24 hours — suspended 

 in water was exposed for varying lengths of time to emulsions of creolin 

 of 2, 1£, 1, and £ per cent strengths. 

 1303'9— No. 7 7 



