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INSECT PESTS OF FARM, GARDEN AND ORCHARD 



Nozzles. A good nozzle is as essential as a good pump for suc- 

 cessful spraying. The best nozzles now in common use are of 

 three types. 



The Vermorel type consists of a small chamber into which the 

 liquid is admitted at a tangent and leaves through a small hole in a 

 removable cap, thus making a fine, cone-shaped spray. A small 



FIG. 40. A good type of geared sprayer for row crops. 



pin, with a spring to hold it back when not in use, serves as a dis- 

 gorger to remove any sediment which may clog the outlet. This 

 type of nozzle is made in many slightly different styles and often 

 sold under trade names, such as the Demorel, Mistry and others. 

 A slightly modified form has no spring attached to the disgorger, 

 but has a loose cap which is held away from the pin by the force of 

 the liquid, and the outlet is disgorged by simply pressing the cap 

 down on the pin. Such are the Spramotor (Spramotor Mfg. Co.) 

 and Vapor-Mist Nozzles (Field Force Pump Co.) and are disgorged 

 rather more easily than those with springs. 



Disc type. An evolution from the older type of nozzles now 

 in almost universal use is the disc nozzle. This has a broader and 



