OSCILLATING BLOWERS OF POWDERS. 
241 
shape to suit may be thus made, whereby the blast can act upon the 
powder in the base of the can. Anot her view of ihe same device with 
an extension-pipe having additional crooks appears in Fig. 3. The let- 
tering 1 has the foregoing explanation so far as it corresponds. Fig. 1 
presents a side view showing the device without its extension-pipe. In 
this form, or with a long, straight extension spout, it may be well used 
in broadcast powdering. To the discharge, f, may be combined a flexi- 
ble hose communicating with a free, stiff pipe, which can be independ- 
ently directed, as desired, in broadcast H ork <>r in powdering trees. This 
is particularly desirable when the bellows is conveyed on a vehicle and 
Operated by the foot or by machinery. Also, however, the bellows may 
be worked or conveyed backward or downward, or a trailing extension- 
pipe may be used with stilt' or tlexile branches such as have been de- 
scribed elsewhere. When the apparatus is hauled it is advisable to 
have the powder receptacle much larger in proportion, of course, and 
with a differently shaped base, yet with the same internal construction. 
Another variation in the small hand -machines is shown in Fig. 5. One 
head of the bellows, g, is secured flat against the side of the can,j», 
which has the form of an ellipsoid cylinder. This makes the apparatus 
very compact and nil in one piece, as it were. By such an arrangement 
the blast-tube curves back ate to pass through the base of the recepta- 
cle. Otherwise the machine is not essentially different from those 
already noticed. 
The following machines devised by others need to be noticed here: 
in Plate XXX, Figs, l, and 3 represent a machine invented 
(No. 178704) by Mr. S. D. Allen, of Philadelphia, F;i. in the Report of 
the Department of Agriculture, on Cotton Insects, p. 247, it received 
the description below ; 
"Fig. L is a side view of the device; 2, an enlarged vertical sectional view of part 
of the same: 3, a transversa section on the line 1, 'J, of 2. • 
" The poisoning compound is contained in a reservoir, A, and is forced in small quan- 
tities at a time through a spont, a, by means of air forced into the reservoir from a 
pair of hellows, D, or other blowing mechanism, to which arc connected arms, BB', by 
means of which t he bellowt may be operated, a spring, e, being attached to the end of 
an upright,/, to serve or assist in distending the bellows. The apparatus is mounted 
on a wheel, w f which imparts motion to the bellows through the me<lium of a rod, p, 
and studs r, on the wheel. By each stud the rod is drawn downward until it is freed 
by springing away from the stud, when it will rise by the action of the spring e. 
The outer end of the lower arm, IV, is adapted to a segmental rod, <j, and is provided 
with a set-screw, by tightening which the arms and bellows may bo confined in any 
relative position to which they may be adjusted as shown, for iustanee, by dotted 
lines in figure 1. The reservoir, A, is provided at one end with a funnel, <?, through 
Which the material is introduced into the reservoir, and at the opposite end is an in- 
clined spout, a, over the end of which is fitted a funnel-shaped guard or shield, b, 
which protects the end of the spout and prevents the clogging up of the same when 
used among wet foliage. 
"The object of making the spout inclined, as shown, is to enable it to discharge 
either up or down or on either side, as desired, without changing the position of the 
bellows, D, the change being effected by merely turning the reservoir around on the 
nozzle, m, of the bellows until the spout is pointed in the proper direction. 
03 CONG 10 
