August 2, 1918.

THE COLLIERY GUARDIAN.

219

By Tests The Best

RESULT OF LATEST TRIAL

INCREASE
IN
EVAPORATION

■
s

“SINGLE HOOD”

“PERFECTA” BOILER CIRCULATOR Ltd., 39, Victoria Street, LONDON, S.W. 1.

N EW type

‘SPECIAL’ PUMP.

Less Steam Used.

No Outside Pipes.

Much Simplified.

i

TANGYES LT-D BIRMINGHAM.

No. 422 D.