DESTRUCTION OF WORMS BY MACHINERY. 



253 



is revolved by a belt, O, from one of the wheels of the truck, working on cone-pulleys, 

 P O, for varying the speed of the screens or sieves, as may he required. The pulley O 

 on the shaft G connects with it by a clutch, R, which is connected v.ith a shiiting- 

 lever, S, for throwing the shaft out of gear when turning around at the ends of the 

 rows, to save waste of material. T'is a box for carrying the stock of powder, from 

 which to replenish the screens or sieves as they become exhausted from time to time. 

 Said box may be also used for a seat for the driver. The sieves are supplied through 

 an opening in the ends, which may be closed by a gate or door of any kind, or by an 

 opening in the side similarly closed. Both attachments, the one with sieves for sifting 

 on in powder, and the one for sprinkling in fluid, are detachably connected to the 

 frame. 



When it is desired to put on the poison with the sieves, in powder, the sprinkling 

 attachment is used for the purpose of dampening the plant, causing the powder to ad- 

 here more firmly, so that the process may be continued through the whole day. 



If it is desired to put on the poison in liquid, then the sprinkling attachment need 

 only be used. 



DESTRUCTION OF LARVAE BY MACHINERY. 



Two machines have been invented and patented for the purpose of 

 brushing the worms from the cotton plant and destroying them. Neither 

 of these machines, so far as I have been able to ascertain, have come into 

 general use. It is doubtful if a practicable machine of this kind can be 

 constructed, owing to the danger of knocking off the bolls of cotton when 

 in operation. The following is an illustration of the machine invented 

 by Mr. Jackson Helm, of Hochheim, Tex. : 



No. 1. 



1 is a side elevation 5 2 is a vertical transverse section of the lower 

 part of the same, taken on the plane of the line c c, 1 ; 3 is a vertical 

 transverse section on the line ft Jc, 1. 



In the accompanying cut the letter A represents a frame composed of two bottom- 

 boards, a a, of four or more uprights, 6 Z>, and a suitable series of cross-braces, d d. The 

 boards a a are on a level and parallel to each other, and have wings e e and // hinged 

 to their inner and outer edges, respectively. To each of the frqnt posts Z> is pivoted, 



