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almost laughable the objections of the few persons referred 

 to. No advancement, no improvement, no general benefit 

 to the human race is ever accomplished without some attend- 

 ant danger, and those who inveigh against such improve- 

 ments as increasino; the risks to life stand on the same 

 footing as the opponents to arsenical poisons as insecticides." 



United States Depaktmext of Agriculture, 

 DivisioK OF EvTOMOLOGY, Washingto:*, D. C, May 26, 1891. 



Jlr. Wm. R. Sessions, Secretary Massachusetts State Board of Agri- 

 culture, Boston, Mass. 

 Dear Sir: — Your favor of the 21st instant duly received. lu 

 reply I may state that ... I consider that the prejudice you 

 refer to (against the use of Paris green in spraying), on the part 

 of Massachusetts fruit growers, is totally uujustified, from a long 

 experience covering some fifteen years ; and while I do not advise 

 recklessness in its use, I feel no hesitation in saying that its use 

 in the manner and for the purpose which you have in mind (spray- 

 ing with Paris green to destroy the gypsy moth) involves no dan- 

 ger to man or beast if proper care be taken in the mixing and 



spraying. 



Yours very truly, 



(Signed) C. V. Riley, 



Eiitoniclogist. 



