U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF CHEMISTRY. 

 BULLETIN No. 13. 



FOODS 



FOOD ADTTLTEKANTS. 



INVESTIGATIONS MAKE FNDEli DIRECTION OF 



H. W. WILEY, 



ClIIKF C'UKMIST. 



PART SEVENTH. 



TEA, COFFEE, AND COCOA PREPARATIONS. 



BY 



GUILFORD L. SPENCER, Assistant Chemist, 



WITH THE COLLAP,' NATION OF MK. ERVIN E. EWELL. 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



WASHINGTON: 



G < > V 1 ; U N ^I E N ']' PRIX r i I X Cr O F F I ( ' E , 



1 S ,t L' . 



