August 23, 1918.

THE COLLIERY GUARDIAN.

377

By Tests The Best

RESULT OF LATEST TRIAL

INCREASE
IN
EVAPORATION

“SINGLE HOOD”

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



AIR COMPRESSORS

Standard Types up to
5,000 c. ft. per min.

Fitted with special light
weight valves, forced
lubrication and
thorough intercooling
arrangements.

Special Types for Air
and Gas storage at
high pressures up to
6,000 lb. per square
inch.

r. *

m-————J

flftll BOMllrHW if

MAKERS
also of

High-Speed

STEAM ENGINES,

STEAM TURBINES,

High and Low Lift

Centrifugal Pumps,

AND

FANS for all purposes.

PETER BROTHERHOOD LTD.,

MANCHESTER : Mansfield Chambers, D ETC0 D ft D ft 11 P U GLASGOW: R. HENDERSON,
St. Ann’s Square.	fElEillDUIlUUwitla	48, West Regent Street.