U. S. DEPARTMENT OF AGRICULTURE. 

FARMERS’ BULLETIN No. 146. 
INSECTICIDES AND FUNGICIDES: 
CHEMICAL COMPOSITION AND EFFECTIVENESS OF 
CERTAIN PREPARATIONS. 
J. K. HAYWOOD, 
oor 
In charge of Insecticide and Agricultural Water Laboratory, 
Bureau of Chemistry. 
Prepared under the direction of H. W. WILEY, Chief Chemist, cooperating with 
the Division of Entomology. 





WASHINGTON : 
GOVERNMENT PRINTING OFFICE. 
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