330 Aqeioultueal Experiment Station, Ithaca, N. Y. 



To summarize briefly, our experiments strongly indicate that the 

 Pear Leaf Blister can be nearly exterminated in a badly infested 

 orchard by a single thorough spraying of the trees in winter with 

 kerosene emulsion diluted with from five to seven parts of water. 



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 brief. 



MARK VERNON SLINGERLAND. 



