GRAVITATIONAL J SPRINKLERS. 
299 
have been already described, this sprinkling- apparatus may be explained 
as follows : 
"Tin- letter I represents a metal strap, attached to the rear bar of the frame, G, with 
the end parts bent forward at right angles and with holes to receive the journals of 
the cylinder, II, the arms of the strap thus serving as springs to keep the cylinder in 
place. By a simple arrangement, indicated in the hgure, the frame, G, may be ad- 
justed higher or lower to the standards, D, according to the height of the plants. In 
the upper side of the cylinder, H, are formed a number of small holes, through -which 
the liquid poison escapes to the plants. In the center of the perforated side of the 
cylinder, II, is formed a hole in which is secured the tube, J, through which the poison 
is poured into the said cylinder. The inner end of tube, J, is soldered in pert to 
the inner surface of the opposite side of the cylinder, H, to prevent it from being 
loosened by the pressure of the liquid. In the sides of the inner end of the tube, J, 
are formed holes of such a size that the liquid will readily pass out of the said tube 
into the cylinder, II. To the rear side of cylinder, II. are attached loops. K, to which 
are attached cords, L, which pass through eyes, M, or around pulleys attached to the 
rear bar of the frame, G. From the eyes or pulleys, M, the cords, L, pass over the cyl- 
inder. H, and are attached to the projecting end of the tube, J. The cords, L, serve 
tosecurethe cylinder, II, in phu e and limit its movement whenturned upon its journals. 
One or more balls, N, may be placed in the cylinder, II. which, when the cylinder 
becomes empty, make a noise, and thus not ify the operator. 
<4 If desired, the cylinder, II, may be rigidly seen red to a .single bar, G, attached to a 
■ingle standard, 1). In this case holes must be formed also in the upper side of the 
cylinder, II. The holes in the up er side let the air escape in filling, and admit air to 
cause the liquid poison to How out through the lower holes. This construction is a 
little simpler and cheaper than the other, but c auses ;t slight waste of the poison, as 
some of the poison will How out through the lower holes while the cylinder is being 
filled. 
"The operator may be protected from the poisonous liquid by cloth 
screens placed upon the opposite sides of the handles, B, and attached 
at their ripper and lower edges to two pairs of rearward I y projecting 
bars attached to the frame-work of the machine. 
"The sprinkling apparatus mentioned in connection with the Robin* 
son Dusting and Sprinkling machine, described on page — , consists of 
a tank, B, for holding the liquid, and of a sprinkling tube, C, connected 
with the tank and extending across the frame and beyond far enough 
to reach the two outside rows. This tube has small perforations, I), at 
the ends, and also at the middle, E, for sprinkling the liquid upon three 
rows of cotton. A gate or valve, F, is arranged in the tank to shut off 
the liquid from the tube or to regulate the discharge. The end of the * 
tube is to be closed with a cap or plug, so that it can be opened and 
the perforations be cleaned out." 
Suction Force-pumps and Windlass Elevators, for filling large elevated 
tanks or raising them, belong very properly to the subject of wheeled- 
sprinklers, but cannot be entered upon in detail at present. Barrels of 
liquid can be loaded onto vehicles by the usual methods of rolling them 
up an inclined supports, &c, also they may be elevated by pulley, wind- 
lass, or derrick arrangements; but in many instances, especially where 
the water is to be taken from a creek or other body of water to the brink 
of which the conveyance may be brought, it is most convenient to pump 
