OSCILLATING BLOWERS OF FLUIDS. 
247 
is shown in Fig. 7, where p is the feeder-can containing the liquid 
poison and y is the blast-pipe. This is united with a screw cap or plug 
which unscrews to separate and open the can. From the blast-pipe 
there projects a small tube, x-y, in the can and opening near the basal 
apex, x. This is the feeding-tube to conduct the liquid up into the blast. 
Its low er end,.r, is at the bottom of the liquid and will remain so whether 
the side, <(, or the side, be down, wherefore the blast-pipe may be di- 
rected considerably downward or upward or horizontally without bring- 
ing this end above the liquid. The opening of this end is preferably 
quite small, but even for single Sprays of good size it need not be small 
enough to clog, with ordinary care to keep the liquid free from rubbish. 
But when in careless hands, or dirty liquid must be engaged, clogging 
may occur. In such cases the can is removed, and a wire forced up 
through the small passage to clear it. When no can-screw is employed, 
and the pipes are inseparably joined to the can, a means for clearing the 
feed pipe is provided by having its lower end extend through the base 
of the can where it is plugged, while a lateral perforation through it just 
inside of the Can admits the liquid. Then tiie end may be opened to pass 
up the wire probe. Also, the feed hole into the side of the tube may 
be formed as a slot, which can be more or less closed by adjusting the 
plug slightly, and thus the liquid supply can be increased or dimin- 
ished or shut off. The plug may shut off the inlet either by deeper in- 
sertion or by rotation upon the axis. The upper end of the feed-pipe is 
generally cut diagonally, and this diagonal part projects into the blast 
with its slope to the leeward. There are certain delicate advantageous 
peculiarities of form for this orifice which need not be detailed here. 
Near the feed pipe perforations are made to allow blast-pressure to be 
exerted upon the liquid to force it up in the feeder-tube. Thus the feed- 
ing principles are similar to t hose in the device just previously described. 
Also the uses of the automatic supply tube, /, are the sameas were given 
above. But in the machine before us there is not an immediate spray- 
discharge; the blast and the liquid fed to it are conducted onward by 
an extension-pipe. If this be very short, as at j-s, in Fig. 8, and the 
mouth-pieopj o, be blown-into strongly, a direct spray will be emitted at 
f ; but the longer this extension-pipe and the more roughness and crooks 
it possesses the more will the spray become condensed against the side 
of the pipe, or separated from the blast to How in the pipe; wherefore 
at some distance its valuable qualities are lost. But by these means the 
liquid and the blast are both conducted in one and the same pipe, to be 
reatomized by the terminal nozzle or nozzles. Instead of the oral blow- 
pipe of Fig. 8 a bellows may be attached on the one end and a long ex- 
tension-pipe on the other. This arrangement appears in Fig. G, where 
like letters indicate how the parts correspond to those of the figures 
already just described. 
The pipe terminates in the simplest form of reverberatory nozzles, de- 
scribed above. Certain of these give spray at an angle from the pipe, 
