40 
growers, for whom this machine is especially adapted, we give below a 
full description of it, accompanied by illustrations. 
As will be seen by consulting Plates vii-ix the machine in the main 
consists of a reservoir, pump, air chamber, strainer, lance, and spraying 
nozzle. The reservoir, with the exception of the bottom, is made of 16- 
ounce sheet copper and holds a little over 3 gallons. The bottom, to 
better withstand the strain put upon it when the pump is in use, is made 
of 20-ounce copper. It is further strengthened by soldering across it, 
inside the tank, two strips of heavy sheet copper, each 1J inches wide 
and 4J inches long. While speaking of the bottom it may be well to say 
that the wall of the reservoir projects in a rim beyond it a distance of If 
inches, as shown by the two dotted lines a and b in Fig. 1, a being the 
point where the bottom is placed and b the edge of the rim. Both top 
and bottom of the tank are soldered in and are provided in each case 
with two openings. The openings in the top, as shown by the black por¬ 
tions in Fig. 2, are for the introduction of the liquid and the piston rod, 
the small round opening serving for the latter purpose. The white por¬ 
tion a in Fig. 2 merely represents the top of the air chamber, which ex¬ 
tends to within 1J inches of the top of the tank. It will be understood, of 
course, that this opening, which is 4J by 7f, is clear throughout, the-top 
of the air chamber offering no obstruction whatever to the introduction 
of the liquid. Into the large opening is fitted a brass wire strainer 
having a number forty mesh. The strainer is shown at Fig. 4. It 
is made by simply soldering the brass wire already mentioned to a col¬ 
lar of sheet copper three-fourths of an inch in height. Across the 
strainer is soldered a narrow strip of copper or piece of heavy brass 
wire which serves the double purpose of a brace and handle. The 
strainer is made with a narrow flange at the top, in order that it may be 
held in place by a shoulder projecting from the edge of the opening in 
the tank. The opening is closed by means of a top, represented at Figs. 
5 and 6. It is made of copper and is so simple in construction that 
further description is unnecessary. The two openings in the bottom of 
the tank are shown at a and b in Fig. 3. Into these is fitted the com¬ 
bined pump cylinder and air chamber, the ends e and /in Fig. 7 being 
the only parts that project outside the tank. By means of the two 
screw caps a and b in Fig. 3 the whole of this part of the machine is 
held firmly in place against the bottom of the reservoir, washers, of 
course, being used to prevent leakage. 
Between the cap a and the tank there is fitted a small casting which 
serves to conduct the liquid from the air chamber into the hose shown 
at c, Fig. 3. The pump and air chamber are shown at Figs. 7 and 8, the 
plunger being removed from the cylinder merely to illustrate it more 
clearly. The air chamber a and the pump cylinder b are simply pieces 
ot 24 inch brass pipe 124 and 4f inches long respectively. Both are sol¬ 
dered to the casting C, a bottom view of which is shown at Fig. 9. The 
top of the air chamber is closed by means of a cap of heavy sheet 
copper d, soldered as firmly as possible to the brass pipe. The plunger 
