THE IMPORTED ELM LEAF-BEETLE. 



21 



7/ 8 



8 



zle having a direct discharge by bending it to one side. The nozzle, ft, 

 and spray, s, are directed laterally, and the nozzle, ?t, is maintained in 

 this position by a metallic hook or eye, v, 

 z/ having a crooked stem inserted at the side 



of the hose in the end of the pole. Where 

 the side spray is permanently desired, the 

 metallic stem is inserted inside the hose 

 and connected with the base of the nozzle, 

 or the tubular stein of the nozzle is given 

 the desired crook. For small trees the 

 simpler extension pipe shown in Fig. 5 is 

 satisfactory The metallic tube, t, several 

 feet in length, is used as the stiff part, t, 

 connected with the hose, h. One longer 

 metallic pipe, having telescopic sections 

 made tight by outside segments of rubber 

 tubing, has also been employed, and is a 

 very desirable extension pipe. ^Where 

 only low end-spraying is to be done, as 

 upon small trees, &c, the eddy-chamber 

 nozzle (Fig. 6) is set upon such a pipe, or 

 upon its own stem, so as to discharge at 

 right angles therefrom ; but a diagonal po- 



sition of the chamber, n, on its stem. 



Fig. 



Farts of 



hose-pole device for 

 ■spraying trees .■ bam- 

 boo pole, b b; drip 

 washer, j ,• hose,/i x-, 

 side book, v; eddy 

 ■chamber nozzle, n m; 

 spray, z s. 



Fir,. 5.— Me- 

 tallic hand pipe 

 with diagonal 

 -nozzle-, hose, h; 

 metallic pipe,?, 

 diagonal eddy 

 chamber noz- 

 zle, n .- its re- 

 movable face, 

 i ; spray. 8. 



throws the spray, s, at an intermediate 

 angle between the right angle and a direct 

 line, by which, without any readjustment, 

 the spray, *, can be directed higher or 

 lower, beneath the foliage or above. For general use, 

 this Rind of nozzle is the best. It consists of a shal- 

 low, circular, metal-chamber (Fig. 0, c), soldered to a 

 short piece of metal tubing, «,as an inlet. The inlet passage, <r, pene- 

 trates the wall of the chamber tangentially, admitting the fluid eccen- 

 trically, and causing it to rotate rapidly in the chamber. The outlet 

 consists of a small hole, s, drilled in the exact center of the face, c. of 

 the chamber, and through this outlet the fluid is driven perpendicu- 

 larly to the plane of rotation in the chamber, and converted into a 

 very line spray. For a full description of this nozzle the reader is re- 

 ferred to our report as Fntomologist to the Department of Agriculture 

 for the years 1881-'82, p. 162. With ordinary force-pump pressure the 

 discharge-hole of the nozzle is about one sixteenth oi' an inch in diam- 

 eter for misty sprays with particles invisibly small. Rather than use 

 the larger, coarser sprays, which were usually employed in these :■ 

 it is* better to use the finest spray. The spray falling upon the exten- 

 sion pipe soon accumulates euough to flow down the pole and wet the 

 hands. To prevent this a wrapping washer o( leather or other flange 



