PISTOXED BLOWERS. 
249 
horse or otherwise. The chamber, />, communicates with the main blast 
by the pressure-tube, x-y, and the poison-passage. When desired, this 
aperture has an adjustable shut-off to regulate or stop the flow therefrom. 
The handle has an incurrent air- valve. 
Either of these apparatuses may have, instead of a single jet, two or 
more jets on pipe-branches, and thus were made compound machines 
involving the same principles. The systems of branching tubes [PI. 
XLIX and XLV1J and the conveyances in these machines combine also 
with others; and also the liquid-feeding reservoir made on the plan just 
described may be substituted in place of the powder-can in the appara- 
tuses presented above and in Plate XXXIII. 
On the other hand, in making very simple atomizers on the above 
plans the extension-pipe, /, may be omitted, and the spray-nozzle can be 
formed as a compartment of the reservoir, ST be attached thereto by a 
short neck. 
"A portable epny machine (Plate XXX, Fig. 4) was made a fe w years 
since by Mr. W. P. Peck, of West Grove, Pa., consisting of a tank 
strapped knapsack-fashion on the shoulders, and connected by rubber 
tubes with a pair of bellows, buckled to the waist, turned by a crank, 
and connected with a movable nozzle. The tank holds* three gallons, 
and there is a simple device at the bottom, which, by the motion of 
walking, keeps the liquid in agitajoo and prevents the poison from 
settling. The liquid issues in a line spray and with considerable 
force." 
Mr. YY. V. Wallace, of Boston, Mass., patented in 1876 (No. 185G03) 
an elastic bulb, discharging a blast in the spout of a watering-pot to 
blow a spray therefrom, which seems to cover the spraying principle of 
the Peck machine. 
RECIPROCATING OR PISTONED BLOWERS. 
[Plate XXXV.] 
(O) for puicder ; b, for liquid.) 
The piston -pumps in Plate XXXV, Figs. 1 and 2, and described 
below, or other air-pumps, may answer as blast producers for blow- 
ing powder or fumes, and for atomizinv; liquids. For these purpose* 
the cylinder of the pump should be preferably larg« r than when it is 
to be used only for compression.. With such blast generators powder 
feeders or atomizers of the kind already described for use with bellows 
can be combined with or without distributing pipes and nozzles as de- 
sired tor simple or compound machines. Those same appurtenances 
were planned for blowers of any kind, but the air-punrp shown in Plate 
XXXV, Fig. 1, was invented and used by myself in such combination 
and subserves the purposes very well. The pump discharges through 
its hollow piston-rod, and this is easily coupled to the blast-pipe of the 
feeding and distributing apparatus. 
