48 THE FLORIDA ENTOMOLOGIST 
The newly produced chemical dust is being used 
the world over to control insect and rodent pests. New 
uses are being reported continually. 
Calcium Cyanide has the unique property of giving 
off the killing agent—hydrocyanic acid gas—on contact 
with the moisture in the air. Hydrocyanic acid gas 
is a powerful insecticide. The dust is simply applied 
and the moisture in the air finishes the job. 
CALCIUM CYANIDE 
gophers, salamanders, turtles, land crabs, ants, chinch 
bugs, rats, nematodes, grubs, moles, citrus aphis, be- 
sides numerous other pests in many parts of the world. 
Leaflets gladly furnished upon request. 
AMERICAN CYANAMID COMPANY 
OF DELAWARE 
Calcium Cyanide is recommended to _ control 
Main Office: 511 Fifth Avenue, New York City 
Florida Branch: 
301 State Bank Building, Orlando, Florida 
Plants Warehouses 
Brewster, Florida Brewster, Florida 
Niagara Falls, Canada East St. Louis, Ill. 
Warners, New Jersey Kansas City, Mo. 
Azusa, California. Spokane, Washington 
