OSCILLATING BLOWERS OF FLUIDS. 
245 
effect, and the chamber may have only plane am! angular conformation, 
or can possess certain irregularly or regularly curved contours. 
An allied and very simple form of atomizer-nozzle, which is only of 
valiu- with blasts, consists of a blast-tube with its discharge end closed 
completely) and having one or two discharges through its side at a short 
distance from the closed end, as shown in Plate XXXI, Fig. 6. The air 
in the short cavity of the tube between the outlet and the closed end act*; 
as an elastic cushion, and there takes place a rebounding and rotary ac- 
tion of the blast, whence atomizing results. With the agitation-cham- 
bers the blast dashes, spreads, and grinds the poison against the inner 
surface of the chamber. Thus they disintegrate, mix, and diffuse any 
lumpy acc umulations of powder poison or masses of liquid that enter 
them, ami the greater the blast force the finer will the powder or spray 
be discharged. 
This introduction of agitation-chambers in atomizers for diffusing or 
Blazing I he materials just before they are discharged, and emitting them 
thus mixed and in a state of intense agitation, is due to myself, and I 
make them iu many different shapes. The activity within is of a rever- 
beratory character, generally arising by internal detlection, causing 
vibration, collision, intercepting, or whirling of currents. The spray 
may be 'discharged from the chamber in any direction or at any angle 
desired, and an atomized spray at right angles from the end of a pips 
is just w hat has been needed to make both practical and economic the 
process of poisoning the nether surfaces of crops. 
Prior to these the atomizing was done on the principle of a blast blow- 
ing the emitting liquid immediately from the discharge of a pipe supply- 
ing the liquid and therein- producing atomized spray. The terminal 
portions of the blast-pipe and the liquid supply pipe stand approaching 
each other at an angle, or either may surround the other. Although an 
immense number of atomizers for surgical and other purposes hove been 
patented, the above principle characterises them all. In patent No. 
173194 Mr. \V. V. Wallace claimed a device for catching and returning 
to a receptacle the drip, which tlows in considerable amount as waste 
from these atomizers. 
Mr. Thomas Woodason, of Chicago, 111., is manufacturing an ordinary 
atomizer represented in Plate XXXII, Fig. 4. The can, contains the 
poison. The bellows, r, has its spout soldered to the top of the can, and 
discharges across the end of the tube, p. As a result the rarefication 
produced in the ascending tube enables the atmospheric pressure in the 
can to cause the liquid to rise through the tube, and from its top the 
atomized spray is blown. This is one of the simplest atomizers to con- 
struct, and it makes a fair spray. It is a small hand instrument to 
produce a single spray in directions not deviating greatly from the 
horizontal. Its feeding principle by blast suction will not work satis- 
factorily except for a very shallow body of liquid ; hence the reservoir is 
necessarily small, and must be filled very often. The first part of the 
blast is wasted in producing a vacuity, and some poison is lost as drip. 
