Issued December 9, 1912. 



U. S. DEPARTMENT OF AGRICULTURE. 



FARMERS' BULLETIN 516. 



THE PRODUCTION OF MAPLE 

 SIRUP AND SUGAR. 



BY 



A. HUGH BRYAN, 



Chief Sugar Laboratory , Bureau of Chemistry > 



AND 



WILLIAM F. HUBBARD, 



Forest Assistant, Forest Service. 



SEP - 7 1914 



Division of Forestry 

 University of California 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 

 1912. 



