274 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
A. J. Lane, of Glenville, Ohio, as patented in No. 22C58S, April 20, 
1880. It consists of a knapsack of cylindrical form having a piston of 
its inside diameter held down by a strong spiral spring. The piston- 
rod is exserted above, whereby it is raised and the spring is compressed 
until the can is filled. Then the spring is allowed to press the piston 
upon the liquid which finds exit by a side tube near its base. A hose 
extension bears a stiff tube having a thumb-levered valve and rose. 
The can is carried on the back by loops over the shoulders. Of its 
practicability 1 am unable to speak, except that it has not a promising 
.aspect. 
A simple rose-syringe, having its middle two-fourths surrounded by 
;a large concentric cylindrical can for the liquid that can enter the 
syringe by perforations which the piston-head may close wheu pushed 
down, was granted as an insect-destroyer in patent No. 216679, June 
17, 1879, to Mr. G. H. Hull, of Montello, Marquette County, Wisconsin. 
The instrument thus has no valves but the piston-head, and should 
{prove superior to the ordinary watering-pots and syringes. Prior to 
this, however, there was issued to Mr. G. T. Wisner, of Florida, Grange 
•County, New York, in No. 193742, July 31, 1877, letters patent on a 
4 ' Potato bug Poison-syringe" having the same general plan as that 
ijust noticed, but differing chiefly in possessing two piston-packings and 
;a funnel-shaped receptacle surrounding it. 
Barrel and Tank pumps and Appurtenances. (Plates xlii, 
jest SEQ.) — Besides the devices already noticed as employable with bar- 
rels or tanks forming parts of machines or carried upon vehicles, or hauled 
upon legs having wheels or runners, or upon horseback, certain barrel- 
pumps and tank-pumps proper and appurtenant machinery deserve 
special consideration as follows. Many of these are presented here only 
;as parts of the history of this subject, while some have a very decided 
rvalue. 
[Single acting, discharging from below the Piston.] 
J. C. Melchcr's Patent Spray Pump. — Among the earlier pumps used 
•especially for the cotton crop should be mentioned that of Mr. J. 
•O. Meleher, of Black Jack Springs, Fayette County, Texas, which em- 
bodies his patent of January 18, 1876. At present our knowledge 
•of it is based only on a very rough wood-cut and circular. The pump 
(tan be made either of sheet metal or stronger metal and may be 
worked with or without a lever. The lever was fixed to the head 
of a barrel by a vertical rod, as with Mr. liuhmanu's (see further on). 
The cylinder of the pump was inserted through a large hole in the 
head of the barrel and had a, cloth suction-strainer below, while its 
top appeared fastened by a collar around the piston and having two j 
Opposite strips extending laterally downward to the head of the/barrel, 
allowing the, pump to be rotated on its axis, to direct the spray. The 
discharge-spout is long, bearing a bicouic air-chamber above and a large, 
single, terminal nozzle lor broadcast sprinkling, appearing to be the 
