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. Another view of vhe same device with 

 an extei^ion-pipe having additional crooks appeais in Fig. .'3. The let- 

 tering 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, s, may be combined a flexi- 

 ble hose communicatiug with a free, stiff pipe, which can be independ- 

 ently directed, as desired, in broadcast work or in powdering trees. This 

 is particularly desirable when the bellows is conveyed on a vehicle and 

 operated by the foot or by macbinery. Also, however, the bellows may 

 be worked or conveyed backward or downward, or a trailing extension- 

 pipe may be used with stiff' or flexile branches such as have been de- 

 scribed elsewhere. When the apparatus is hauled it is advisable to 

 have the powder receptacle much larger in proj^ortion, 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, z^ is secured flat against the side of the can, ^, 

 which has the form of an ellipsoid cylinder. This makes the apparatus 

 very compact and all in one piece, as it were. By such an arrangement 

 the blast-tube curves back at e to pass through the base of the recepta- 

 cle. Otherwise the machine is not essentially different from those 

 already noticed. 

 The follovying machines devised by others need to be noticed here: 

 In Plate XXX, Figs. 1, 2, and 3 represent a machiue invented 

 (No. 178704) by Mr. S. D. Allen, of Philadelphia, Pa. In the Keport of 

 the Department of Agriculture, on Cotton Insects, p. 247, it received 

 the description below : 



''Fig. 1 is a side view of the device; 2, an enlarged vertical sectional view of part 

 of the same: 3, a transverse section on the line 1, 2, of 2. 



" The poisoning compound is contained in a reservoir, A, and is forced in small quan- 

 tities at a time through a spout, a, by means of air forced into the reservoir from a 

 pair of bellows, D, or other blowing mechanism, to which are connected arms, BB', by 

 means of which the bellows may be operated, a spring, e, being attached to the end of 

 an upright,/, to serve or assist in distending tbe bellows. The apparatus is mounted 

 on a wheel, s, which imparts motion to the bellows through the medium of a rod, p, 

 and studs n, 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, B', is adapted to a segmental rod, g, and is provided 

 with a set-screw, by tightening which the arms and bellows may be confined in any 

 relative position to which they may be adjusted as shown, for instance, by dotted 

 liues in figure 1. The reservoir, A, is provided at one end with a funnel, d, 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, 6, 

 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 th« 

 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 CO>('a Iti 



