56 EXPERIMENT STATIOxM. [Jan. 



COARSE NOZZLE VERSUS MIST NOZZLE 

 SPRAYING. 



G. E. STONE. 



At tlio present time much thought is being given to the 

 general technique of spraying. The subject is an important 

 one and is by no means settled, either as regards equipment or 

 methods. Our own State has done its share in this respect 

 since the important economic problems involved in handling 

 the gypsy and brown-tail moths have made it necessary to 

 originate and utilize the most modern and efficient spraying 

 machinery. 



For the perfection of modern spraying on a large scale 

 great credit should be given to Mr. A. H. Kirkland, a graduate 

 of this college and former superintendent of the Gypsy ]\Ioth 

 Commission, whose handling of economic problems of this 

 nature has been unexcelled, and particularly to Mr. L. H. 

 Worthley, the present superintendent. The former methods 

 of spraying advocated and used by the old commission were 

 considered revolutionary in those days, and great credit should 

 be given to ]\rr. E. C. Ware, the mechanic associated with 

 the former commission, for developing an improved outfit and 

 for originating the best fine mist nozzle as yet devised. The 

 old method, however, has been practically discarded, since the 

 modern method is much cheaper nnd about as effective. 



This makes use of the powerful high pressure machine and 

 coarse nozzle, which is capable of throwing a stream to a great 

 height, this breaking up into a more or less fine mist. The 

 first attempt to use engines in spraying dates back some years. ^ 

 Most of the devices were very crude in construction. Mr. J. 



' L. O. Howiird, Year Book, Department of Agriuulturc, 1895, pp. 361-394, and 1896, pp. 69-88. 



