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. 



Wnjjs G. JOHNSON. 



NEW YORK CITY, 



February 75, igos. 



