N. A. DAVIS 7 SIFTER. 



249 



which are slotted longitudinally to receive the standards B B, and at or near the 

 middle of the length of this bar D a hole is made to receive freely through it the rod 

 C'. The ends of bar D are notched at , and are attached to the standards B B by 

 fitting these notches over the pins 6 6, as shown in Figs. 1 and 2. 



The machine thus described is operated while the horse is traveling between the 

 rows of plants by giving endwise motion to the bar D, which will communicate vi- 

 brating motions to the sifting-boxes and scatter the powder over the plants. [Patent 

 No. 160,986, dated M arch 6, 1875.] 



Fig. 58 illustrates the machine patented by Mr. Nicholas A. Davis, 

 of Eusk, Tex. 



No. 1. - . 



FIG. 58. N. A. Davis' sifter. 



No. 1 represents the invention attached to a cart ; No. 2 is a cross- 

 section through the line y y. 



In the drawings, A represents an ordinary farm-cart, across the rear end of which is 

 secured the horizontal shaft B, having its bearings in the arms c c, projecting behind the 

 cart. On the shaft B, I place two or more loosely- revolving perforated cylinders, E, 

 being revolved upon the shaft, which carries a pulley, a, over which a band or cord 

 works, passing to the hub of the cart-wheel, from which it receives motion, and thus 

 causes the shaft B to revolve when the cart is in motion, and the shaft, Carrying the' 

 perforated cylinders, previously filled with the powdered poison, causes the poison to 

 be sifted out and distributed over the cotton plants. Attached to the inner end of 

 each of the outside cylinders is a spiral spring, 6, coiled around the shaft, A, and so 

 arranged as to secure an easy, gentle, lateral motion to the cylinders in case of a sud- 

 den jar given the machine, and thus prevent too great a discharge of the poison at 

 any one point. 



It is evident that a similar spring may be used at the opposite end of the cylinders, 

 so as to check the jar in both directions. 



From the above description of the invention, it is evident that it could be affixed 

 to any kind of frame moving on wheels, and by a hand-crank and ordinary cog-gearing 

 be successfully worked. [Patent No. 154651, dated September 7, 1874.] 



