SHADE TREES. 



253 



exception of those used by the State in spraying for the gypsy moth. 

 These are excellent. 



Too much attention cannot be given to the nozzle. It should be adapted 

 to the work required of it, and a satisfactorj^ or ideal nozzle is worth 

 almost any price. It should be constructed on mechanical principles 

 which will enable it to break up the spraying mixture into as fine a mist 

 as possible, and to do this at a distance convenient for the economical 

 spraying of trees. The ideal nozzle for spraying either from the ground 

 or from a ladder should 

 possess some carrying fea- 

 tures, and still break up the ^/^ 

 spray finely. The nozzle 

 should not be encumbered, 

 any more than the hose, 

 with worthless mechanical 

 devices which produce fric- 

 tion without adding any- 

 thing to its efficiency, and 

 for this reason we believe 

 that it is better to employ 

 mechanical devices to break 

 up the spray after it has 

 left the nozzle rather than 

 in the nozzle itself. This 

 applies, of course, to that 

 type of nozzle intended to 

 be used with high pressure, 

 either from the ground or 

 from a ladder, since in this 

 case it is necessary to have 

 nozzles adapted to throw a 

 certain distance in order to 

 reach the foliage, and have 

 it broken up into as fine a 

 mist as possible. This does not apply to types of nozzles like the Ver- 

 morel and Friend, which are well adapted to the purposes for which they 

 are intended. 



For high-pressure, solid-stream spraying in long-distance work, the 

 Wortliley tips are best. These tips range in size from one-eighth inch 

 upwards, according to height of stream desired. They are constructed 

 so as to break the stream into a mist at a certain height. With this type 

 of nozzle the tops of trees can be sprayed most effectively, although the 

 lower foliage does not receive so much of the spray. To overcome this 

 difficulty the writer has devoted a great deal of time to experimenting 

 with new types of nozzles, and from some forty or more designs two have 

 been constructed which have given good results. One of these, known as 



Fig. 109. — " M. A. C." nozzle. A, atoniizinj? 

 point or de Hector; B, wing Imndle to adjust 

 or swing point; C, nozzle proper; D, hollow 

 case to protect A and C. 



