210 
Psyche 
[December 
pools within 500 yards of the operations, the use of copper 
sulphate as a larvicide and the use of repellants by the work- 
men. Control work was carried on during 1932 under the di- 
rection of Mr. J. D. Crawford. In the report at the end of 
the season, Mr. Crawford recommended that the work be 
continued during the season of 1933. 
