January 12, 1917.

THE COLLIERY GUARDIAN.

89

Write for List No. 736<

11, Tothill Street,

READING

LONDON, S.W.

Nine Elms Iron Works,

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.

id

1050

1000

1100

80

60

70-

Id
Id

Q.
X
m

o
a

600	700	800 SOO 1000	1100

GALLONS PER MINUTE.

o
z

Id

500

-400

-300

Pulsometer engineering 12

OFFICES:	WORKS: