6 BULLETIN 186, U. S. DEPARTMENT OF AGRICULTURE. 
SUMMARY. 
Fumigation by the method described in this Ballean was found to 
kill insects without injury to the seed and with a considerably shorter 
exposure than is necessary in the usual method of seed- fumigation. 
Further experiments will be conducted with special reference to the 
use of carbon bisulphid, which is not considered in this paper. 
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