October, '12] 



SAFRO: LIME SULPHUR WASH 



393 



Of these, sixteen hatched, the larvae all surviving. Taking for granted 

 that the seven failing to hatch were killed by the treatment still the 

 survival amounted to about 70 percent, indicating the futility of spraj'- 

 ing with lime-sulphur and lead arsenate to prevent hatching of the 

 eggs. 



LIME-SULPHUR WASH (30° B.) 1-30 AND LEAD ARSENATE 4-100, DETAIL TABLE 



Calcium Polysulphides (5 percent Solution). The lime-sulphur 

 used in the previous experiments was undoubtedly, to some extent, 



the cause of the death of the embryo. In order to obtain some data 



2 



