iL! 
Connected with either pump is a long, flexible pipe, with its distal 
part stiff, and serving as a long handle whereby to hold its terminal 
nozzle beneath the branches or very high up at a comfortable distance 
from the person managing it. Parts of one form of this extension pipe 
are shown in Figs. 1 and 2. 
To the pump-spout is attached the long, 2-ply, flexible hose, h h, of 
finch caliber. Its considerable length, 12 feet or more, allows the 
nozzle to be carried about the tree without moving the pump. Beyond 
its flexile part the hose, h, passes through a bamboo pole, b, from which 
the septa have been burned out by a hot iron rod. At the distal end of 
the pole the hose terminates in a nozzle, n or m. When the nozzle is in 
its natural position, m, the spray, 2, is thrown straight ahead, and this 
suits well for spraying very high branches; but for spraying the under 
surfaces of the lower parts of the tree if is necessary that the nozzle 
discharge laterally from the pipe, and this is accomplished with a noz- 
zle having a direct discharge by bending it to one side. The nozzle, n, 
and spray, s, are directed laterally, and the nozze, n, is maintained in 
this position by a metallic hook or eye, v, 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 stem of the nozzle 
is given the desired crook. For small trees the simpler extension pipe 
shown in Fig. 2 is satisfactory. The metallic tube, ¢, several feet in 
length, is used as the stiff part, ¢, connected with the hose, h. One longer 
metallic pipe, having telescopic sections made tight by outside seg- 
ments of rubber tubing, has also been employed, and is a very desir- 
able extension-pipe. Where only low-end spraying is to be done, as 
upon small trees, ete., the eddy-chamber nozzle is set upon such a pipe, 
or upon its own stem, so as to discharge at right angles therefrom; but 
a diagonal position of the chamber, x, on its stem, 7, throws the spray, 
s, at an intermediate angle between the right angle and a direct line, 
by which, without any readjustment, the spray, s, can be directed high 
or lower, beneath the foliage or above. For general use this kind of 
nozzle is the best. With ordinary force-pump pressure the discharge 
hole of the nozzle is about one-sixteenth of an inch in diameter for misty 
sprays with particles invisibly small. Rather than use the larger, 
coarser sprays, which were usually employed in these tests, it is better 
to use the finest spray. The spray falling upon the extension-pipe soon 
accumulates enough to flow down the pole and wet the hands. To pre- 
vent this a wrapping washer of leather or other flange may surround 
proximally from the spray, and the drip will drop off from its margin. 
Such an arrangement is indicated at j in Plate 1, Fig. 1. 
While one person operates the pump, another, standing in the vehicle 
or upon the ground, directs the spray by the stiff part of the pipe. Thus 
the operator can not only spray higher and lower with convenience, but 
he can to a great extent move the spray from place to place without 
10484—No. 6——2 | 
