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UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 973 
Washington, D. C. T June 5, 1923 
MILK-PLANT OPERATION 
By 
CLARENCE E. CLEMENT, Market Milk Specialist, Dairy Division, 
Bureau of Animal Industry 
CONTENTS 
Page 
The need for technical knowledge 1 
Receiving milk at the plant 2 
Grading, sampling, and testing 3 
Pasteurizing and cooling 4 
Bottling and capping 7 
Washing bottles 16 
Washing cans 25 
Sanitation ia city milk plants 25 
Wastes incurred in handling milk 28 
Checking milk through the plant 34 
Number of men required to operate milk plants 38 
Systems of buying milk 39 
Disposal of surplus milk 42 
Manufacture of by-products 44 
Weights of milk and cream 44 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1923 
