OSCILLATING BLOWERS OF POWDERS. 239 



XXXIY. The base of the bellows is clamped fast to tbe plow, while 

 its face, v, is free to be moved. A spring inside the bellows distends it. 

 The cleat on its head extends as an arm, x, which is connected with 

 the plowman's foot, preferably bj^ a jointed rod of stout wire, n. A 

 double loop about the heel and instep forms a comfortable and secure 

 attachment to the rod, and has a weak part strong enough to work the 

 bellows, but not with sufScieut strength to drag the plowman in case 

 of a runaway accident. When the foot is advanced the section of the 

 rod next to it falls to a horizontal position, while the second section 

 swings forward as a pendulum. The length is such that during the 

 moment while the person's weight is resting on the foot the advancing 

 plow causes a pull on it, and thereby a puff from the bellows, the pull 

 being made b^' the horse only. A series of such puffs succeed each 

 other, one occurring each time the foot is planted. The discharge from 

 the bellows sweeps through the short pipe, h, is fed by poison in the 

 reservoir, p, and conducted through the pipe, t, wliich has a flexile part, 

 Zj and behind the plowman an outlet, s, dicects it from below diagonally 

 upward into the row. The i^uff's, which occur at intervals of about two 

 feet apart, spread so broad as to overlap, and thus fill all parts of the 

 row with the poison. As shown, one, part of the pipe near its end may 

 drag upon the ground. Instead of this a pair of branch pipes may be 

 used to supply two rows. 



A similar bellows apparatus, to be carried by a person, is shown in 

 Plate XXXIII, Fig. 2. The can, jp, is hung upon the back by a loop 

 passing over the shoulder. The hand -bellows, v, may be operated be- 

 tween the hands, or, if it is suspended beneath the arm-pit, by one arm. 

 Its blast- tube extends through the base of the can as a feed-pipe, and 

 so communicates with the ijendent or trailing branched pipe, i g s^ sup- 

 plying two rows as shown. 



Instead of the pendent pipe a pair of hanging branched pipes can be 

 connected with the main blast, and thus the apparatus is enlarged for 

 poisoning four rows at a time. 



A person can use this arrangement on horseback. Eiding down one 

 middle the branched pipes hang between the two adjacent middles, 

 supplying two rows on each side. For this purpose the hanging tubes 

 must be elongated and flexible. 



In Plate XXXI, Figs. 1, 2, 3, 4, and 5, is represented a very small 

 hand-blower, which may be used where the worms appear in small 

 patches. It consists of the hand-bellows, v, discharging through the 

 pipe, h s, which perforates the base of the can, jp, and extends far. beyond, 

 usually with its distal end, s, crooked, so it can be used to throw in an 

 angular direction. This pipe may have two branches, and thus apply 

 to a pair of rows. The device will also be found convenient for treating 

 many plants and insects other than those ©f the cotton crop. 



The figures referred to need to be noticed more in detail. Fig 4 may be 

 taken as presenting the more typical form of this device. It represents 



