U. S. DEPARTMENT OF AGRICULTURE. 



Uj^.OCa' 



u/ 



Department Bulletins 



Nos. 776-800. 



WITH CONTENTS 

 AND INDEX, 



Prepared in the Division of Publications,. 



JOHN L. COBBS, Jr., Chief. 



WASHINGTON: 



COVERNMENT PRINTING QFFICE, 



1922. 



