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COPY 
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Willows, California, 
llay 14, 1918. 
Mr. E. Vi'. Kelson, 
Chief, Bureau of Biological Survey, 
Washington, D. C. 
Dear Sir; 
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I am in receipt of your letter of liay 7, inquiring for the • 
names of the makers of explosive bomts for protecting rice fields from 
duckr, the California Fireworks. Company, of 249 Front Sti*eet, San 
Francisco, California, have made a specialty of these bombs, which 
cost about fifty cents a piece. , This firm has done considerable ex- 
periment!^ and have succeeded in nakii:g a very good bomb. 
The bomb contains two charges and is shot from a small mortar, 
the first charge throws the bomb about two hundred feet in the air 
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where it explodes with a loud report and forms a small cloud of smoke. 
Vjhere these bombs are properly used they are bery successful in 
keeping the birds away from the rice. 
* 
Yours very truly. 
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JOJS .jar- ^ ‘ . 
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PACIFIC DICE GEOVffiRS' ASSH, 
(signed) Ernst E. Behr. 
Secretary. 
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