BUCKET AND KNAPSACK PUMPS. 
271 
and fires, but in barrel and tank pumping or wherever greater force is 
commendable a levered force-pump will generally be preferred, and such 
will be described further on. 
In No. 150836, on May 12, 187S, Mr. B. T. Deakin, formerly of Shef- 
field, England, but now of Philadelphia, Pa., patented his so-called u Ed- 
oelsior Pump and portable Fire extinguisher," which has a flange-shaped 
foot-piece and combines in itself the characteristics of the double-acting 
" Aquapults " and " Aquajects.'- This pump works well and will rank 
with those above described. 
Here may be appended a notice of the so-called "Eydropult" of which 
Mr. W. T. Yose, of Newton ville, Mass., is the patentee and manufact- 
urer. His letters patent date November 15, 1868, ami extension No- 
vember l.~>, 1>>7*. This pump is represented in Plate XL, Fig. 4. The 
two cylinders, I: fc, are continuous by the U coupling mounted on the 
large stirrup- shaped foot-piece, p. A pair of pistons joined above 
with each other and with the single handle, wi, work up and down to- 
gether and simultaneously in the cylinders. The suction-hose, /<, from 
a bucket or other receptacle, communicates, at i, H it h one cylinder, while 
the oilier e\ Under has an air-chambered discharge, ae, near its top. 
The operation is as follows: The upward stroke causes the water to 
pass through the first piston-head and till the U coupling and both cyl- 
inders. The downward stroke discharges about all of this up through 
the second piston and ejects half of it from the spout. The second up- 
ward stroke ejects the other half or the contents of the second cylinder 
while both cylinders arc simultaneously filled by the suction. Thus the 
entire contents of one cylinder is thrown out at each stroke, while the 
upward stroke also suck k : both cylinders full. This device is mope com- 
plex than the pumps noticed above and sutlers more friction while it 
does not work as easy as the others, yet it is a reliable pump capable 
of such uses as the " AquajectS " are adapted for. 
Btjcket-pumps and knapsack pumps (Plates XLI and LV). — Be- 
sides the "Bucket-pumps* 1 and ••Knapsack-pumps" already noticed, 
numerous others are made for extinguishing fires, sprinkling plants, 
etc., but in general they are such as have little value in the treatment 
of tield crops. Yet in this connection it seems desirable to call special 
attention to the following examples: 
Plate XLI, Fig. 3, illustrates the three forms of u \.< wU?S Combination 
Force Pump" as manufactured by Mr. P. 0. Lewis, of Catskill, X. V., 
under his patent, Xo. L'oOo'.'W, August 3, 1880. It is a syringe of large 
size, having a double-cupped rubber piston-head and three substitutive 
discharge attachments. In the one ease the solid jet nose-piece or in- 
jector-spout is screwed on. In its stead a rose-head face may be used, 
making of it a spray-syringe, his '-Potato Bug Exterminator." Thirdly, 
an end-piece having a suction hose, suction valve, and a side discharge 
spout may be attached, thus producing a simple single-acting force- 
pump. The discharge spout, as shown in the figifre, has a short hose- 
