254 



REPORT UPON COTTON INSECTS. 



at g, a lever B, which carries a wheel, C, at its front end.. There are thus two such 

 wheels, C C, that rest on the ground in front of the apparatus. Draft-hooks /< h are 



applied to the front ends of the 

 levers B for hitching the draft ani- 

 mals to, by which the machine is 

 drawn over the field. The lovers 

 B can be swung on their pivots, to 

 raise the frame A on the wheels C, 

 whenever stones, stumps, or other 

 obstructions are to be avoided. In 



> 2. such case the levers B are or can 



be locked to toothed-plates i, which 



are applied to the rear posts 6, as indicated in Fig. 2. When the machine is to 

 be turned, it is also necessary to elevate the frame A off the ground, and throw the 

 whole weight of the apparatus upon the wheels C. Whenever the frame A is thus 

 raised, the wings e and / will be swung up, to clear the upper expanded parts of the 



No. 3. 



FIG. (52. Helm's machine. 



cotton-plants. This is done by connecting the two wings that arc hinged to each 

 board a with each other by a string j, which passes over the lever B, so that in swing- 

 ing up such lever, the string will be drawn with it to contract or swing up the wing. 

 In the front ends of two horizontal bars I I, that are longitudinally secured to the 

 upper parts of the posts ft, is hung a tranverse drum or shaft D, and from which a 

 series of pointed brushes, E E, are suspended. Brushes F F are also rigidly affixed to 

 a cross-bar, wi, back of the shaft D, and to inclined bars n w, that are secured to the 

 sides of the frame A. These several brushes are made of split white-oak, or other 

 suitable material. 



For use, the machine is placed to straddle a row of cotton between the inner wings 

 e c. The boards a a rest in the furrows and the outer wings on the rising sides of the 

 adjoining ridges, all as clearly shown in Fig. 2. The wings rest with their weight on 

 the sides of the ridges. The machine being drawn ahead, the shaft D is revolved by 

 its brushes E, which come in contact with the cotton-plants. Also, by subsequent 

 contact with the brushes F F, the worms are all swept to the ground, on which they 

 are finally crushed and destroyed by the weight of the boards a, and wings cf. 



It will be noticed that as the machine is drawn successively over the several rows 

 or ridges of cotton, each side of each ridge is twice pressed, once by an outer wing, /, 



