16 BULLETIN 342, U. S. DEPARTMENT OP 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. 



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 

 handled even under the most effective system of inspection. 



REFERENCES TO LITERATURE. 



I. 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. 109-131. 

 • Jena, Feb. 16, 1914. 



3. Jordan, Edwin O. The municipal regulation of milk supply. Journal of 



the American Medical Association, vol. 61, no. 26, pp. 2286-2291. Chicago, 

 Dec. 27, 1913. 



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 Bui. 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. 



7. Rupp, Philip. Chemical changes produced in cows' milk by pasteurization. 



U. S. Department of Agriculture, Bureau of Animal Industry Bulletin 

 166, 15 p. 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. 



II. 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-^10. 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 C. George M. Oyster, jr.. Baby Milk Philanthropy, report for 



the first 18 months beginning Apr. 24, 1911, and ending Oct. 24, 1912. 

 20 p. 



WASHINGTON : GOVERNMENT PRINTING OFFICE : 1916 



