January 5, 1917.

THE COLLIERY GUARDIAN.

13



• •• TRADE

•• • MARK • • •

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 Heatfhg Plants. The Units can be
readily removed and installed in a new position when
necessary.

Speciality

COAL SCREENING « CONVEYING

-w:

Send for Folder No. 3074C.

DAVIDSON & Co. Ltd

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

SIROCCO

Engineering Works,

BELFAST.

WORK IN
BRITAIN
COLONIES.

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONE-DUST

For FIERY WORKINGS.

Suitable for COLLIERY SHALES.

MECHANICAL ENGINEERING OF COLLIERIES. T. c. fTJtbrs.

Vol. 1., Price ais. net (By post 21b. 8dJ.	Vol. II., Price ios. 6d. net (By post Ils.).

SUPPLEMENTARY VOL.—Price ios. 6d. net (By post Ils.).

THE COLLIEBY GUABDIAN CO. LTD.. 30 & 31, Furnival Street, Holborn, London, E.C.

Richard Scholefield, Leeds.

■Phone 1513.	ENQUIRIES SOLICITED. Wire “Brick, Leeds.”

PERFEiia

CIRCULATOR 39, Victoria Street, London, S.W.

(TUB A
BOLTS
^upS,S9
zus.

Union
Brand I

ooa

CONSIDERABLY OVER
100 PLANTS H
Estimates and Designs on application.

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

BRICKMAKING
MACHINERY