188 MICROBIOLOGY 



consumer, especially very young children. Where these are 

 the cause of difficulty they may be removed by filtering the 

 milk through absorbent cotton thus giving great relief to the 

 patient.* 



* For a study of leucocytes in milk and other questions relating 

 to pure milk the student is referred to the following works: 



Swithinbank and Newman. Bacteriology of Milk. 



Ward. Pure milk and the Public Health. 



Campbell. Leucocytes in milk, methods of determination and 

 the effect of heat upon their number. Bulletin No. 117, U. S. Bureau 

 of Animal Industry, 1909. 



Doane. Leucocytes in Milk and their Significance. Bulletin No. 

 102, Maryland Agric. Exp. Station, 1905. 



Moore. Bacteria in Milk. N. Y. State Dept. of Agric., 1902. 



Bergey. The Source and Nature of Bacteria in Milk. Bulletin 

 No. 125, Dept. of Agric., Commonwealth of Pennsylvania, 1904. 



Bergey. The Cellular and Bacterial Content of Cow's Milk at 

 different Periods of Lactation. Univ. of Pennsylvania Medical Bul- 

 letin, 1904. 



Various authors. Milk and its Relation to the Public Health. 

 Bulletin No. 56, Hygienic Laboratory, Public Health and Marine- 

 Hospital Service of the United States, p. 1-757. 



