October 18, 1918.

THE COLLIERY GUARDIAN.

823

It speaks for itself

Q	80-
z	
y	70
u	
u_	60
w	1100

1050

1000

600

700	800 SOO 1000

GALLONS PER MINUTE.

500

400
z
-300 m

1100

IUI OJji*?*#

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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.

Write for List No, 736.

Pulsometer engineering 6?, E?

OFFICES :	WORKS:

11, Tothill Street,	Nine Elms Iron Works,

LONDON, S.W. 1.	READING.

1