HYDRONETTES, ETC. 
265 
fliction with the pumping. The greatest freedom in the use of this im- 
plement is attained by inserting its suction-pipe in a knapsack-can for 
the poison Liquid. To pump from a vessel which must rest upon the 
ground the pumping has to stop whenever the position of the vessel is 
to be changed. A second person can carry the receptacle, but this is 
really less satisfactory and far less economic than to use the knapsack- 
can. This combination of such pumps with the knapsack-can was pat- 
ented (No. 209668) as a "fire extinguishing apparatus" by Messrs. J. E. 
Oondict and Albert J. Doty, of Philadelphia, Pa., on November 5, 1878. 
These pumps also have a wide application for various purposes, such as 
washing windows, vehicles, &c, which gives them a great value in ad- 
dition to that for 1 blowing poison. The combinations already noticed 
are best suited to apply the poison on small patches of the plants, or 
where the worms have appeared only in some isolated spots in the fields ; 
but for general, broadcast poisoning they have been more successfully 
used on horseback or from a cart or wagon. 
A horseback method of employing these pumps may be illustrated 
by plate XLI, Fig. 1, which represents one being operated to take and 
distribute the poison from a pair of rubber bags hung across the back 
of a horse. The two bags are joined above by straps, and in front are 
provided with hose pipes which unite with each other and with the suc- 
tion-hose of the pump. This point of juncture is seen in front. These 
bags, though somewhat costly as compared with other horseback re. 
ceptacles for carrying poison, answer the purpose well, and their use 
for poisoning cot ton (ields has been due to the ingenuity of < 'apt. .lack 
son Warner, of Austin, Tex., who has manufactured them for some 
years in combination with another pump. 
The use of an eddy-jet and 6J tension-pipe such as is presented in 
Plate XXXIX. Pigs. 2 and •">. for delivering a good spray at a safer 
distance from the rider, is an improvement introduced for all broadcast 
distributing apparatuses as well as for applying poison to the nether 
surfaces, and these will be used to much advantage with the various 
kinds of horseback receptacles already devised. The person wearing 
the knapsack apparatus shown in Plate XXXIX, Fig. 2, can use it for 
broadcast work on horseback, in which case he may still wear the can 
upon himself or he can hang it upon the saddle or horse, as he chooses. 
Also, by duplication, a pair of such caus, with or without a sipho con- 
nection, and hung across the horse, answers well to give balancement 
and supply the pump. 
The method of using these pumps from a barrel or tank in a cart or 
wagon is illustrated in Plate XXXVIII. 
"The most common mode of using them is the following: A barrel 
containing the liquid is put on a cart or wagon and drawn over the 
field. One hand is employed, if necessary, to keep the poison stirred 
up, while three others, each w T ith one of these pumps, apply the liquid 
from the rear of the wagon, one taking charge of the three inner rows, 
