U. S. DEPARTMENT OF AGRICULTURE. 



DIVISION OF CHEMISTKY. 

 BULLETIN No. 13. 



._. .AGRICULTURAL 

 FOOD SI LIBRARY, 



UNIVERSITY 

 CALIFORNIA 



AND 



FOOD ADULTERANTS. 



BY DIRECTION OF 



THE COMMISSIONER OF AGRICULTURE. 



PART FIRST: 



DAIRY PRODUCTS 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1887. 



! 



