UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1166 
Washington, D.C. T July 26, 1923 
APPLE BY-PRODUCTS AS STOCK FOODS 
By 
G. P. WALTON, Assistant Chemist, and 
G. L BIDWELL, Chemist in charge of Cattle Food Laboratory 
Miscellaneous Division, Bureau of Chemistry 
CONTENTS 
Page 
Purpose of investigation 1 
Utilization of apple by-products 1 
Yield of apple by-products 3 
Manufacture of dried apple by-products: 
Apple pomace 5 
Apple-pectin pulp 7 
Composition of apple by-products: 
Apple pomace and apple-pomace silage 8 
Dried apple pomace 10 
Dried apple-pectin pulp 18 
Feeding value of apple by-products: 
Apple pomace 22 
Apple-pomace silage 25 
Dried apple pomace 26 
Dried apple-pectin pulp 29 
Comparative cost of feeding apple by-products 33 
Summary 33 
Literature cited 35 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1923 
