December 8, 1916.

THE COLLIERY GUARDIAN.

1105



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.

G% TO 3% SAVING IN FUEL, or 1 2^ TO 5% MORE STEAM

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

... T/'.	■

' ’I

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COAL SCREENING. CONVEYING

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.



CONSIDERABLY OVER

mn piantq

iOlf I I O and THE colon!es-

Estimates and Designs on application.

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



LBAblMS

MECHANICAL ENGINEERING OF COLLIERIES. T.c.fbJtBrs.

Vol. 1., Price 21s. net (By post 21s. 8d.L	Vol. II., Price 10s. 6d. net (By post 11b.).

SUPPLEMENTARY VOL.—Price 10s. 6d. net (By post Us.).

THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C.

BUMSTED & CHANDLER LTD.

Cannock Chase Foundry and Engine Works,

HEDNESFORD, STAFFS.

Telegrams—“ Bags. Hednesford.”	Telephone—48 Cannock.

FANS

AND
ENGINES

FOR

MINE

Ventila-
tion,
with
Special

Reversing
Doors.

	



High
Speed
Engines
FOR
LIGHTING
and
POWER

Centri-
fugal
Pumps.

Haulage
Gears,
&c.

Above illustration shows our Steel Cased Reversing Fan, which is passing a larger
volume of air than the 40 feet brick-cased fan alongside it.

MC3B0

/TUB
/ BOLTS

|cupS,S9

Union
Brand 1



HOWARD STREET

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