132 INTERRELATIONS OF PLANTS AND ANIMALS 



4. Some useful bacteria. 



5. Conditions of growth of bacteria. 



6. Raising germs for profit. 



7. Some common disinfectants. 



8. Indispensable bacteria. 



References (Also see Probs. XIV and LVI) 



Hunter, Essentials of Biology. Chap. XII. 



, Elements of Biology. Chap. XI. 



Davison, The Human Body and Health (Advanced). 



Conn, Bacteria Yeasts and Molds in the Home. 



Thompson, W. H., " Indispensable Bacteria " Everybody's Magazine, 

 August, 1909. 



Rowe, " Raising Germs for Profit." Pearson's Magazine, April, 1910. 



Elliott, Household Bacteriology. Library of Home Economics, Chi- 

 cago, 1907. 



Conn, H. W., The Story of Germ Life. 



Practical Dairy Bacteriology. 



Bacteria in Milk and its Products. 



Thomson, W. H., Some Wonders in Biology. 



Elliott, Moore, and Pierson, Bacteriology of the Household. Cornell 

 University Reading Course, February, 1909. 



Lipman, Bacteria in Relation to Country Life. 



Metchnikoff, "The Utility of Lactic Microbes." Century Magazine, 

 November, 1909. 



Van Rensselaer, Martha, Dust as Related to Food. Cornell University 

 Reading Course, Ser. IV, No. 18, 1905. 



"Facts about Milk." Farmers' Bulletin No. 2, U. S. Department of 

 Agriculture, Ser. IV, No. 18, 1905. 



Salmon, "Directions for the Pasteurization of Milk." U. S. Depart- 

 ment of Agriculture, Bureau of Animal Industry, Circular No. 1 (re- 

 vised), 1897. 



Rogers, " Bacteria in Milk." Reprint from Yearbook of Department 

 of Agriculture for 1907, Washington. 



Frankland, Mrs. Percy, Bacteria in Daily Life. 



Conn, Agricultural Bacteriology. 



Bailey, L. H., " The Making of Clean Milk." Country Life in America, 

 June, 1904. 



Wells, " Water and Ice Supply." Farmers' Bulletins 43, 73, 262, 309, 

 U. S. Department of Agriculture. 



