XVI FUMIGATION METHODS 
editions. If this volume will in any way answer the 
numerous questions asked on the subject of fumiga- 
tion, either with hydrocyanic acid gas or carbon bisul- 
phid, or suggest methods for future work along 
these lines, the writer will feel repaid for his labors. 
WILLIS G. JOHNSON. 
New York CIty, 
february 15, 1902. 
