March 9, 1917.

THE COLLIERY GUARDIAN.

499

It speaks for itself

1100

1000

WORKS

OFFICES

Nine Elms Iron Works

Tothill Street

READING

LONDON, S.W

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
•309 CD

600	700	800 SOO 1000	1100

GALLONS PER MINUTE.

*7’

• as-,, ;

Hl

r .

*

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. fl**®

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