16 BULLETIN 342, U. S. DEPARTMENT OF AGRICULTURE. 
certain risks which can not be completely eliminated in any other 
way, the pasteurization of milk is certain to be the general practice — 
in this country. 4 
The greatest feature of the process of pasteurization, properly 
performed, is that while no valid objections can be raised against the 
process, it causes an additional degree of safety in milk produced and 
handied even under the most effective system of inspection. 
-REFERENCES TO LITERATURE. 
1. Mohler, John R. Conditions and diseases of the cow injuriously affecting 
the milk. Treasury Department, Hygienic Laboratory Bulletin 56, 
pp. 501-526. 1909. 
2. Ayers, S. Henry, and Johnson, W. T., jr. The destruction of bacteria in 
milk by ultra-violet rays. Centralblatt fiir Bakteriologie, Parasitenkunde 
u. Infektionskrankheiten. Zweite Abteilung, vol. 40, no. 1/8, pp. 109-1381. 
Jena, Feb. 16, 1914. 
38. Jordan, Edwin O. The municipal regulation of milk supply. Journal of 
the American Medical Association, vol. 61, no. 26, pp. 2286-2291. Chicago, 
Deen2Gabors. 
4, Ayers, S. Henry. The pasteurization of milk. U. S. Department of Agri- 
culture, Bureau of Animal Industry Circular 184, 44 p., 32 figs. 1912. 
5. Ayers, S. Henry, and Johnson, W. T., jr. Pasteurization in bottles and the 
process of bottling hot pasteurized milk. Journal of Infectious Dis- — 
eases, vol. 14, no. 2, pp. 217-241. Chicago, March, 1914. Also U. S. 
Dept. of Agriculture Bul. 240. 
6. de Schweinitz, E. A. The pasteurization and sterilization of milk. Year- 
book of the U. S. Department of Agriculture, 1894, pp. 331-356. 
. Rupp, Philip. Chemical changes produced in cows’ milk by pasteurization. 
U. S. Department of Agriculture, Bureau of Animal Industry Bulletin 
HOG fA deja 2 1913: 
8. Bowen, John T. The cost of pasteurizing milk and cream. U. S. Depart- 
ment of Agriculture Bulletin 85,12 p. 1914. 
9. Ayers, S. Henry, and Johnson, W. T., jr. A study of the bacteria which 
survive pasteurization. U. S. Department of Agriculture, Bureau of 
Animal Industry Bulletin 161, 66 p. 30 figs. 1913. 
10. Ayers, S. Henry, and Johnson, W .T., jr. Ability of streptococci to survive 
pasteurization. Journal of Agricultural Research, vol. 2, no. 4, pp. 
321-330. July 15, 1914. . 
11. Ayers, S. Henry, and Johnson, W. T., jr. Ability of colon bacilli to survive 
pasteurization. Journal of Agricultural Research, vol. 3, no. 5, pp. 
401-410. Feb. 15, 1915. . 
12. Ayers, S. Henry, and Johnson, W. T., jr. The bacteriology of commercially 
pasteurized and raw market milk. U. S. Department of Agriculture, 
Bureau of Animal Industry Bulletin 126, 98 p. 1910. 
13. Weld, Ivan GC. George M. Oyster, jr., Baby Milk Philanthropy, report for 
the first 18 months beginning Apr. 24, 1911, and ending Oct. 24, 1912. 
20 p. - 
14. Hess, Alfred F. Infantilescurvy. II. A new aspect of symptomatology, pathol- 
ogy, and diet. Journal of the American Medical Association, vol. 65, p. 1003- 
1006. Sept. 18, 1915. 
“I 
WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 
