Issued October 28, 1910. 



U. S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY BULLETIN No. 134. 



H. W. WILEY, Chief of Bureau. 



MAPLE-SAP SIRUP: 



ITS MANUFACTURE, COMPOSITION, AND 



EFFECT OF ENVIRONMENT 



THEREON. 



By 



A. HUGH BRYAN, 



CHIEF SUGAR LABORATORY. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE. 



1 1) 1 . 



