September 22, 1916.

THE COLLIERY GUARDIAN.

569

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It speaks for itself



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1050

1000

1100

80

60

70-

500

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600	700	800 SOO 1000	1100

GALLONS PER 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.

surface,
surface,
minute.

Write for List No. 736.

Pulsometer Engineering G,°. IL

OFFICES :

WORKS:

11, Tothill Street,

Nine Elms Iron Works,

LONDON, S.W

READING