November 10, 1916.

THE COLLIERY GUARDIAN.

897

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Steam Heater Units

for

FACTORY HEATING.

Advantages of the Unit System :

Absence of air ducts, which obstruct the light, and in some
cases would interfere with the overhead gear in a shop.

Sirocco Heater Units only require steam and drain
connections and cables to the Electric Propeller. The
Units occupy very little floor space. The temperature can
be regulated at each Unit, consequently no steam is wasted
by overheating some portion of a building in the effort of
maintaining a desirable temperature in some other portion.
The warm air is delivered near the floor level where it is
most needed. Extensions to the Unit System are easily
carried out, and it will be found invaluable for supplementing
existing and insufficient Heating Plants. The Units can be
readily removed and installed in a new position when
necessary.



Send for Folder No. 3074C.

DAVIDSON & Co. Ltd.

SIROCCO
Engineering Works,
BELFAST.

Speciality—

COAL SCREENING«CONVEYING

k.

It

i

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon.

WORK IN
BRITAIN
COLONIES.

STEAM, MOTOR, BELT, OR ROPE=DRIVEN

AIR & GAS COMPRESSORS

From 50 to 15,000 cubic feet

FOR

COLLIERIES, MINES, Etc.

ADVANTAGES

SIMPLICITY.

RELIABILITY.

SELF=LUBRICATION

SMALL FLOOR SPACE.

»

ADVANTAGES

DURABILITY.

HIGH EFFICIENCY.

BEST WORKMANSHIP.

MINIMUM MAINTENANCE

One of Two 1,400 c.f. Air Compressors, in De Beers Mines S.A.

BELLISS & MORCOM LIMITED,

Telegrams :
“BELLISS, BIRMINGHAM.”

BIRMINGHAM.

London Office :

8, VICTORIA STREET, S.W.