272 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
extension bearing a nozzle, to be held in one hand. This nozzle is 
described on page 209, (see Plate XIX, Figs. 6 and 7.) As a cheap pump 
extensively advertised it has had a good sale and given considerable 
satisfaction. The u Combination Pump 19 made in brass, retails at $5.50. 
A hook is provided for attaching the base of the pump, but, as in other 
pumps of this class, generally there is wanting some better means of 
support to sustain the cylinder in an upright position and so leave the 
left hand free to hold and direct the nozzle, while the other hand works 
the piston. 
The sketch in Plate XLI, Fig. 2, represents a pump support, pat- 
ented in No. 124593, March 12, 1872, by Mr. C. G. Korth, of Oarlstadt, 
N. J., and shows an attempt to supply in pumps of this class something 
to make their use more convenient. It consists of a crutch attached to 
the pump and serving as a fulcrum for its lever. The top is held firmly 
in the arm-pit while the sharp pointed base of the pump presses against 
the bottom of the bucket, barrel, or other receptacle for the liquid. This 
leaves one hand free to hold the nozzle. The other features of this 
pump appear in no way novel or superior, but the inventor controls the 
use of his support in pumps of all kinds. 
The following buclcet-pumps and knapsack-pumps, which are occasionally 
offered by the trade, seem not the most desirable for poisoning the crop, 
though some on the list are well suited for other purposes and some ex- 
hibit features which may be hereafter combined in the pumps which 
are best adapted for our purpose. 
In patent No. 212067, February 4, 1879, Mr. A. Stoner, of Stony Point 
P. O., East Baton Eouge, La., claims some details in a simple puinp of 
this type which seems to have no very special advantage for our present 
purposes. 
Mr. W. W. Mallory, of Holland Patent, Oneida County, New York, 
obtained in a pump similar to the above, and in patent No. 237193, 
February 1 , 1881, a pump-cover, consisting of a tube which bends hori- 
zontally and then downwards as a handle, overflow spout, and guide to 
the piston-rod, which works through a hole in its top. 
Patent No. 92194, July 6, 1869, secured to H. and A. Kaiser, of Co- 
lumbus, Ohio, a pump of this kind but permanently attached inside of a 
common watering-pot, its basal branch-spout with excurrent valve, co- 
incides with that of the pot and bears a rose or substitutive solid-jet 
nozzle as desired. 
A pump granted in patent No. 86287, January 26, 1869, to Mr. A. M. 
Dix, of Sheltou, England, has the cylinder-cap clamped to cross-bars 
inserted in the upper part of a suitable receptacle. There is a stuffing- 
box above for packing, and below this an outlet from the upper part of 
the cylinder is extended downward by a drip-tube upon the side. A 
diaphragm-strainer is inserted in the chamber of the discharge-valve. 
A pump having similar construction to those just noticed, but with 
the valves reversed, ^ving suction through the basal branch-spout and 
