CHAPTER XXI 



Accessories 



Nozzles 



Nozzles, as now designed, have reached a point of greater efficiency 

 than was the case a few years ago. On small hand outfits, adapted 

 for the kitchen garden, the question of nozzle is not so important. It 

 is neither possible nor necessary to get up heavy pressure with these 

 outfits, and the amount of work to be done is comparatively light. 

 But in orchard spraying, particularly on a large scale, the nozzle may 

 greatly help or hinder rapid and satisfactory work. 



The so-called Bordeaux nozzle is one of the older types still in use 

 on light hand outfits. It has an adjustable opening, which may be 

 arranged so as to throw a semisolid, fan-shaped stream, or a fairly 

 fine spray. This nozzle is entirely unsuited to orchard work on any 

 considerable scale, but is well liked for vineyard or field spraying be- 

 cause the nozzle can quickly be cleaned by reversing the core. 



The vermorel nozzle has a central orifice, back of which is usually some 

 particular type of chamber. As originally designed, the entire nozzle 

 was small, and the central opening decidedly so. It invariably clogged 

 up in short order, and hence was, and is, made with some sort of needle 

 built into the central line of the nozzle, and so arranged that this 

 needle can be forced forward to clear the orifice. The nozzle gives a 

 fine, mist spray. Its defects are its intolerable tendency to clog and the 

 fact that it can deliver only a small quantity of spray material; in 

 other words, it is of low capacity. However, on light hand outfits, 

 it is in general use and is fairly satisfactory. 



The modern disk nozzle was evolved from the vermorel. It differs 



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