56 



foliage, and will, I trust, be found, by more thorough experiment, 

 efficient as an insecticide when used of a strength that will preclude 

 injury to foliage. 



Late in the summer a preparation of petroleum sludge with soap 

 was sent me from the ^"ew York Chemical Works for trial, but there 

 were very few insects at that time on which to test it, while its almost 

 intolerable and persistent odor is really a serious objection to its use, 

 especially in small gardens. 



In making my experiments, I have used the Lewis Combination 

 Force Pump and Syringe, and consider them well adapted for use in 

 small orchards and vineyards, and especially adapted for purposes of 

 experimentation, where the larger and heavier appliances are not 

 necessary. 



