s. D. ALLEN'S SIFTER. 



247 



width of the rows or height of crop. Doubtless this machine would be 

 found much better than the hand-dusters, especially when poisoning 

 small cotton. 



Fig. 56 represents an apparatus for distributing powdered substances 

 upon plants, invented by Mr. Samuel D. Allen, of Philadelphia, Pa. 

 Patent No. 178704. 



FIG. 53. Allen's duster. 



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, , by means of air forced into the reservoir from a 

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

 by means of which the bellows may be operated, a spring, c, being attached to the 

 end of an upright, /, to serve or assist in distending the bellows. The s 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 det-screw, by tightening which the arms and bellows may be con- 

 fined in any relative position to which they may be adjusted as shown, for instance, 

 by dotted lines in Fig. 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 inclined 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. 



