U.S. DEPARTMENT OF AGRICULTURE, 



BUREAU OF CHEMISTRY-BULLETIN NO. 68. 



II. W. WJLKY, Chief of Burciiu. 



THE CHEMICAL COMPOSITION 



OF 



INSECTICIDES AND FUNGICIDES, 



WITH AN ACCOUNT OF THE METHODS OF ANALYSIS EMPLOYED. 



J. K. I I.VVXVOOl), 



<l<' ninf Atricii/tiirn/ \\<iltr 



IN COOI'K RATION WITH TIIK DIVISION ol KXTOMOLOGY. 



WASHINGTON: 



GOVERNMENT PRINTING OFFICE, 



1902, 



