252 



REPORT UPON COTTON INSECTS. 



and the dry poison applied immediately after this, causing the powder 

 to adhere better. 



FIG. 61. W. T. Robinson's combined sprinkler and duster. 



No. 1 is a plane view and No. 2 is a longitudinal sectional elevation of Mr. Robin- 

 sou's machine. 



A is :i two-wheeled truck, of proper height and width to run along above one row 

 and provided with a tongue to hitch on the animals, so as to go on opposite sides of 

 the row. B is a liquid-holding tank on the front part of the frame. C is a sprink- 

 ling-tube, connected with the tank and extending across the frame and beyond far 

 enough to reach the two outside rows, and having small perforations, D, at lli<- ends, 

 and also at the middle, E, for sprinkling the liquid upon the three rows of cotton. A 

 gate or valve, F, is arranged in the tank to shut off the liquid from the sprinkling- 

 tube when it is not required to flow, and also regulate the discharge. The end of this 

 tube is to be closed with a cap or plug, so that it can bo opened, and be swabbed out 

 from time to time, as it becomes foul. Behind the truck is a horizontal shaft, G, ex- 

 tending each way beyond the wheels, for reaching over the outside rows, and carrying 

 three or more revolving screens or sieves, H, for sprinkling on powdered substances. 

 Said shaft is mounted on the rear end of the frame I, which is jointed to the truck at 

 J, and suspended from the frame M by ropes, L, which arc wound up on the shaft N, 

 or let out from it, to shift the screens according to the height of the plants. The shaft 



