326 The Principles of Fruiting-gr owing 



6. The style or "make" of pump and nozzle to be used 

 depends on the particular kind of work to be done. The 

 reader will now see that the advice as to machinery must 

 depend on the specific purpose for which the appliances 

 are to be used and the extent of operations. Apparatus 

 devised a few years ago for the distribution of paris green 

 may be of no value for the application of such a thick 

 compound as the bordeaux mixture or the lime-sulfur. 



Whatever the outfit chosen, the pump should be strong 

 and powerful, with hard brass working parts, and capable 

 of throwing much liquid with great force. In respect to 

 nozzles, it may be said that there is no one kind which is 

 best for all purposes. It is desirable that the liquid should 

 reach the plant in the form of a very fine mist; but it is 

 just as important that the nozzle should have the power 

 of throwing the liquid to the desired point. In other words, 

 there are two elements to be considered, the nozzle must 

 have carrying power and delivering power. A fine mist 

 at the orifice of the nozzle is of no use when the nozzle is 

 30 feet short of the bug. With many of the modern devices, 

 the man who holds the hose in spraying rigs may stand 

 8 or 9 feet above the ground, and he may use a pole 12 

 to 15 feet in length, which will elevate the nozzle something 

 like 25 feet from the ground; but many apple trees are 

 50 to 60 feet high. It will therefore be seen that the 

 liquid must carry itself 25 to 30 feet beyond the nozzle. 

 For such purposes, a nozzle that distributes the liquid 

 in a spray directly from its orifice is of small use; it must 

 throw a more or less solid stream, and the stream should 

 break up when it reaches its destination. Such nozzles 

 require very strong power behind them. 



For the spraying of fruits, the various disc nozzles are 

 now most in use. They are provided with a chamber in 



