CHAPTER XXII. 
CERTIFIED MILK. 
Definition. Certified milk is milk produced under 
conditions imposed by medical milk commissions, which 
usually employ a veterinarian, a bacteriologist and a 
chemist to look after the production of the milk. It must 
Fig. 48. —Sanitary Dairy Barn. (Da. Div., U.S. Dept. of A.) 
be free from disease germs and preservatives, must have 
a known chemical composition, and must be so produced 
and handled as to insure a minimum number of bacteria. 
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