308 University Geological Survey of Kansas. 
WORKING BARREL 
LIFTING VALVE, 
Yaga CLACK VALVE. 
SUCTION. 
Bs) STUFFING BOX. 
SLEEVE. 
WIND BORE, 
ANO 
SCREEN 
1 neon anal elev atk Corniat 
pump — sectionalized. 
ing barrel. Figure 81. Upon the suction is placed another 
section of pipe, with an inside diameter such that it will slip 
on over it like a sleeve, which it is called. The lower end of 
this pipe is provided with a screen, which consists of a piece 
of wire cloth or a sheet of perforated metal, placed over the 
end and crimped, in the former case, up around the pipe, be- 
ing held in place by wires or a clamp. Figure 81. The 
screen is to prevent any foreign substance, such as sticks, 
hay, old hats, pants, boots, and in fact any foreign substance, 
being drawn up into the column pipe from the sump, and so 
clogging up the pipe by catching in the valves. The total 
area of the openings in the screen must be greater than the 
cross-section of the pipe. 
The sleeve bearing the screen must fit tightly upon the 
