THE COLLIERY GUARDIAN.

1251

June 30, 1916.

g'	. . ..	=

It speaks for itself.

Q

80

1100

1050

1000

500

L+f-^j?fftTr~300 “

SOS 700	800 SOO 1000	1100

GALLONS PER MINUTE.





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 C° L-

OFFICES :	WORKS:

11, Tothill Street,	Nine Elms Iron Works,

LONDON, S.W.	READING.