22. OUR SHADE TREES AND THEIR INSECT DEFOLIATORS, 
may surround the pole proximally from the spray, and the drip will drop 
off from its margin. Such an arrangement is indicated at j in Fig. 4. 
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 leaving his own 
position and withont moving the ves- 
sel of poison with the pump. 
The hose and bamboo combination 
was conceived of, and used as the 
lightest, long, stiff tube practicable 
for these purposes, and it has answered 
admirably. <A similar pole, with a 
metallic tube in its interior, with a 
nozzle not producing the very fine 
Fic. 6.—Eddy-chamber nozzle, natural size; mist desired, and lacking the side dis- 
can rae charge, &c., was afterward learned of 
as being used in California. (See Agricultural Department Report, 
1881-82, p. 208.) 
By the apparatus used, when everything is prepared, a tree can be 
sprayed quickly, and a large grove is treated in a short time. It is 
equally adapted for forestry use in general, and likewise available for 
poisoning on fruit trees, when not in fruit, while the shorter style of 
extension-pipe is convenient for underspraying all kinds of low plants. 
