June 28, 1918.

THE COLLIERY GUARDIAN.

1315





It speaks for itself

noo

1050

WOO

Write for List No. 736.

Pulsometer engineering C,“ 12

WORKS

OFFICES

Nine Elms Iron Works

READING

LONDON, S.W. 1

Pumping Plant in a Colliery Pumproom 1,050 feet below surface.
Three units each delivering 50,000 gallons per hour to the surface.
Efficiency of Pumps, 79 per cent. Speed, 1,485 revs, per minute.

Motors work at 5,500 volts.

•500

-400

X
-300 tri

600	700	800 SOO 1000 HCO

GALLONS PER MINUTE.

fi