February 8, 1918.

THE COLLIERY GUARDIAN.

291





It speaks for itself

l!00

1050

1000

Pulsometer engineering C°. U

OFFICES

WORKS

Nine Elms Iron Works

LONDON, S.W. 1

READING

surface,
surface,
minute.

Pumping Plant in a Colliery Pumproom 1,050 feet below
Three units each delivering 50,000 gallons per hour to the
Efficiency of Pumps, 79 per cent. Speed, 1,485 revs, per
Motors work at 5,500 volts.

■500

400
x
•300 CD

600	700	800	900	<000	1100

GALLONS PER MINUTE.

j