316 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
with a worm, throug 1 . which the oil is poured and on to which the wick- 
tube is screwed, as in the figure, the lower part of the tube which enters 
the reservoir being perforated. The shoulder above the screw is de- 
signed to prevent the falling of cinders or fire into the kerosene. 
"One of the simplest lamps is that which I herewith illustrate (Plate 
LX, Fig. 5). It has been extensively used and is a mere modification 
and simplification of the Walker lamp. The reservoir is here soldered 
to the center of the pan, and the wick -tube to the top of the oil reser- 
voir. The oil is poured in through an opening near the edge of the 
top of the reservoir." 
Other lamp-pans not materially better than those described have been 
patented by Mr. J. R. Duke, of Korristown, Ark., Mr. J. E. Stephens, 
of Lone Star, Miss., Mr. C. K. Dudley, of Canton, Miss., Mr. R. Pitman, 
of West Point, Iowa, Mr. G. C. Cranston, of South Bend, Ind., and 
others, but with the examples described, a detailed account of all these 
will hardly be necessary. 
Lamps in Motion will next be noticed. 
The Le Blanc Cotton-moth Destroyer. — "As a result of the observa- 
tion that the moths that are flying in the field are not so readily at- 
tracted by a stationary light as by one in motion, the two following 
machines have been invented with a view of being drawn or dragged 
through the field : The first of these is the Le Blauc eottou-moth 
destroyer, invented by Mr. Auguste Le Blanc, of Louisiana, La. (pat- 
ent No. 101028, March 22, 1870), and represented at Plate LXI, Fig. 
6. The apparatus is mounted on wheels, A, and consists of a platform, 
B, (o which are secured a number of extensible posts, c, supporting a 
roof, D, from which is suspended by a chain or rope the devices to ob- 
tain the light. This device consists of the reservoir, E, which commu- 
nicates through pipes, a and with a series of radial burners, F, 
which are arranged so as to form a circle of about 8 feet in circum- 
ference, though the dimensions may be increased' or decreased. The 
posts, c, are rendered extensible b} r being formed in two parts, c the 
one fitting and sliding in the other. A series of holes, e, are made, one 
in the part, c, while a spring top or pin, /, is fixed to the other, d. By 
this means the burners may be raised or lowered at pleasure. Thereof 
does not serve alone to shield the burners from rain, but, if painted 
with a white paint or with any other sticky substance, also helps to 
attract and destroy the moths. In order to use this machine effectually, 
Mr, Le Blanc suggests that the cotton should be planted so as to leave 
at inter vals, say, of 2 acres, a space wide enough between the rows to 
permit the machine to pass through. 
" The Fordtran Cotton-Moth Destroyer. — The second machine to be men- 
tioned in this connection, invented by Mr. E. FI. fordtran, of Flatonm, 
Tex. (patent No. 196211, October 10, 1877)." It consists of a number 
of lamp-traps hung on a cross-bar, supported and connected with a 
horse by <\ pair of shafts, with their hind ends bent down to form run- 
ners to slide upon the ground. The cross-bar can be raised or lowered 
