116 Wisconsin Academy of Sciences^ Avis, and Letters. 



transferred to the vines ; in less than two weeks the grapes were 

 entirely free of these pests, without resorting to other means. 

 I know of many incidents illustrating the woful ignorance 

 of persons otherwise intelligent, who were waging an exter- 

 minating war against insects and birds, at the very time they 

 were engaged in the good work of devouring noxious insects. 



