PLATE 6. 



SOURCES OF COXTAMIXATIOX IX MILK. 



1. Farm pump water, dec. Agar pla.e. Incubation, 24 houi-s at 37' C. ; 4S hours a: iS C. 

 Size of plate, 13 X 11 inches. 

 II. Dairy well water. 5 c.c. Agar plate. Incubation, 24 hours at sr C. ; 4S hours at IS' C. 

 Size cf plate 13 X 11 inches. 



[ Face page 2<>. 



