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A AT ECONOMIC ENTOMOLOGY. 



in a very short time, A moderate-sized tree can be sprayed with 

 a group of Vermorel nozzles in from one to three minutes. A 

 good pump will easily supply two lines of hose, and most of 

 those now made for orchard spraying are supplied with two dis- 

 charge openings. A three-quarter hose is all that is necessary, 

 even when a compound nozzle is used. The Vermorel nozzle 

 is supplied with a ' ' degorger, ' ' or apparatus for cleaning out 

 the spray opening in case it becomes clogged ; but it is not 

 easily clogged, and is, in fact, one of the most satisfactory from 

 that stand-point. With a screen at the bottom of the suction 

 pipe the meshes of which are not larger in diameter than the dis- 

 charge opening in the nozzle, clogging should be practically im- 

 possible. 



Fig. 475. 



The Nixon nozzle.— i, complete ; 2, 3, the two parts, separated. 



The Nixon nozzle is a satisfactory bit of apparatus, working 

 on an entirely different principle from the cyclone. Here we 

 have a barrel-shaped cylinder of varying length, at the base of 

 which the water enters through a small opening in a solid jet, di- 

 rected against a wire screen at the tip of the cylinder. With a 

 good force behind it, a fine spray is sent from such a nozzle from 



