THE FARM 309 



diphtheria, scarlet fever, and possibly of tuberculosis may 

 be carried by milk that has not been pasteurized, i.e., 

 heated from 150 to 160 F. and kept at that temperature for 

 twenty minutes. Milk peddled in open cans and buckets 



FIG. 99. Dr. Stephen N. Babcock, inventor of the test for determining 

 the per cent, of butter fat in milk. (Courtesy of Agricultural College, Univer- 

 sity of Wisconsin.) 



is always to be avoided. The demand for a pure milk supply 

 of necessity increases the cost of milk to the consumer. 



Modern dairy farming with its high-priced high-bred cows, 

 its expensive dairy outfits and farm buildings, expensive 



