260 REPORT 4, UNITED STATES ENTOMOLOGICAL COMMISSION. 
tion of structure, expensiveness, and also some other features which 
have prevented it from coming into the market. It is an early attempt 
to introduce air pumps and air-pressure in cotton-worm destroyers. 
A pair of air-pumps are used, but nothing new is claimed for their 
construction. The arrangement for producing the spray is the old- 
fashioned gas jet, which was also patented in 1878 by Mr. Adolph 
Weber, of Detroit, Mich., as a nose-piece for spraying water. The 
nozzle is presented in Plate XV, Fig. 5, and its description. 
The following appeared in the first edition of this work, concerning 
Mr. Daughtrey's invention : 
"The Datjghtrey Atomizer. — There still remains one machino 
to be described in this connection which is highly interesting for several 
reasons: 1st, because it is the only one actually in use for the distrib- 
uting of the liquid from below; 2d, because the construction of the 
pump is quite peculiar; and, 3d, because the arrangement for produc- 
ing the spray is not only entirely different from any described in the 
foregoing pages, but also most simple. This machine was invented by 
Mr. William J. Daughtrey, of Selma, Ala. (patent No. 200376, February 
19, 1878). The accompanying sketch (Plate XXXVI) represents it as 
it appears. It consists in the main of a pump, which is made self-op- 
erating by means of a pulley, and which forces air into the receiving 
tank and into a compression cylinder connected therewith, thus supply- 
ing the pressure necessary for the production of the spray. As will be 
seen from the sketch, a transverse distributing pipe is connected with 
a number (four in the sketch) of vertical pipes recurved at the ends, 
which receives the nozzles, one of which is represented in section in 
Plate XXXVII, Fig. 5. The nozzle. N, which is screwed onto the pipe, 
has a closed end, n, provided with two openings, n\ oppositely inclined, 
so that the jets delivered through them meet at a point near n and de- 
flect and disperse each other so as to form an extremely fine spray. 
The openings, n 1 , are large enough to avoid being obstructed by small 
obstacles, and the spray produced by the two inclined jets is at once 
copious and powerful. 
u The following is a more detailed description of the machine, very 
much in the inventor's own words, Plate XXXVII, Fig. 9, being a ver- 
tical section and Plate XXXVII, Fig. 3, a detailed view of the axle- 
tree, showing the parts connected therewith in section : 
" In the drawings A represents the frame of a vehicle, B B the wheels, and C C 1 the 
two axles constituting the axletree, which have their bearings, c, fastened below the 
frame, A. Between the bearings, c, the axles, C C 1 , are provided with shoulders, c ! , 
whereby they are prevented from parting with each other longitudinally, while a 
socket, &, at the inner end of the axle, C 1 , incloses the inner end of the axle, C, and 
thereby prevents both axles from moving out of line. The two said axles may be 
coupled by means of a pin, c 3 , inserted into the socket, c 2 , and axle, C, but usually it is 
omitted, and the axles, C C 1 , are allowed to revolve independently of each other. The 
hubs, b, of the wheels, B B, ;irc, provided with set-screws, ft 1 , or coupling-pins, b 2 , or with 
both, in order to fasten t hem to the axles, C C l . The use of the set-screw, 6', and pin, 6 5 , 
