U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF CHEMISTKY. 

 BULLETIN No. 25. 



A POPULAR TREATISE 



ON THE 



EXTENT AND CIIARA'CTER 







OF 



FOOD ADULTEEATIO^s T S. 



BY 



ALEX. J. WEDI>ERBURN, 



SPECIAL AGENT. 



PUBLISHED BY AUTHORITY OF THE SECRETARY OF AGRICULTURE. 



WASHINGTON: 

 GOVERNMENT PRINTING OFFICE. 



1890. 



