UNITED STATES DEPARTMENT OF AGRICULTURE 
DEPARTMENT BULLETIN No. 1147 
Washington, D. C. 
June 9, 1923 
CHEMICAL, PHYSICAL, AND INSECTICIDAL PROPERTIES 
OF ARSENICALS 
F. C. COOK, Physiological Chemist, Insecticide and Fungicide Laboratory 
Miscellaneous Division, Bureau of Chemistry 
and 
N. E. McINDOO, Insect Physiologist, Fruit Insect Investigations 
Bureau of Entomology 
CONTENTS 
Page 
Purpose of investigation 1 
Arsenicals studied 1 
Chemical properties of arsenicals 2 
Physical properties of arsenicals 20 
Page 
Comparative toxicity of arsenicals 24 
General properties of arsenicals 56 
Summary S3 
Literature cited • 55 
WASHINGTON 
GOVERNMENT PRINTING OFFICE 
1923 
