246 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
A large reservoir of liquid on the spout of a hand bellows would be 
too unwieldy even were it practicable in atomizers made on this princi- 
ple. To remedy this in such apparatuses and prevent waste by dripping 
I have added an automatic supply by way of a small tube leading from a 
larger reservoir carried higher, as between the shoulders, upon the back, 
or upon one of the handles of the bellows, or otherwise, together with 
other features, all of which may be better explained by the figures. As 
seen in Plate XXXII, Fig. 5, bellows, v, has a long blast-tube, i, opening 
at e into the chamber, p. This also produces a pneumatic pressure 
upon the liquid in the can, p. A poison-inlet, 2, connects with a rubber 
tube from a larger and more elevated reservoir, not shown in the 
figure. A diagonal tube, xy, has its lower part open in the proximal 
lower angle, a?, of the can, while its upper end opens at a larger ori- 
fice, ?/, through the upper face of the can, and preferably near its distal 
side. This instrument is designed to be held with the pipe, i, directed 
downwards to carry the can, jp, beneath the plants sprayed. The liquid 
horizon will then be at the lower extremity of the inlet-tube, I. Each blast 
depresses the liquid, causing some to rise up through the tube, x y, and 
be sprayed upward by the ascending blast at s. At the same time a 
small volume of the air is forced to enter the tube, and ascend into 
the larger reservoir, to displace water enough to restore its level up to 
the lower extremity of the tube, closing its orifice so that no more air 
can enter, and hence no more liquid can descend. Thus the very small 
can,j), is fed automatically, itself being of a very wieldy size and serv- 
ing rather as a nozzle than as a reservoir. When a large supply of 
poison is not needed the tube, Z, may be corked tight and the can, p, 
is filled through the hole, y or I, preferably by immersing the whole 
can in a vessel of poison so the latter may enter at either of those 
orifices. 
The liquid is drawn in quickly by opening the bellows while closing 
its suction hole by the thumb or hand. In this device blast-pressure 
rather than blast suction feeds the liquid out, and the blast- discharge 
is taken preferably from a facial orifice, whence it surrounds the outlet 
of the liquid. 
The foregoing device is quite practical, and there are no difficult points 
in the construction or adjustment of its parts. But the ordinary me- 
chanic finds it more difficult to construct the following machines accu- 
rately in all their proportions, although they are no more complex than 
those already noticed, over which they possess mechanical advantages, 
in their operation and application, giving a preference. The principles 
which J have introduced in these render possible the construction of 
practical compound machines for delivering two or more blast-sprays from 
a single blower and a single feeder. This, also, is accomplished without 
complexity and at moderate cost. The following examples should be 
considered here. The simple hand apparatus in Plate XXXI, Figs. 
0, 7, and 8, will be described first. The internal anatomy of the feeder 
