April 5, 1918.

THE COLLIERY GUARDIAN.

709

It speaks for itself

id

1000

60

1100

80

70

O

Z

u

Id

Z 1050

Q

UJ

Id

—.—

500

400 U
X
■300 tri

600	700	800	900	1000	1100

GALLONS PER MINUTE.

surface.

Pumping Plant in a Colliery Pumproom 1,050 feet below
Three units each delivering 50,000 gallons per hour to the surface.

Efficiency of Pumps, 79 per cent. Speed, 1,485 revs, per

Motors work at 5,500 volts.

Write for List No. 736

minute.

Pulsometer engineering 62 K

OFFICES :

WORKS:

11, Tothill Street,

LONDON, S.W. 1

Nine Elms Iron Works,

READING