January 18, 1918.

THE COLLIERY GUARDIAN.

117



■ •• TRADE • • ■

-	‘ mark--- •

FANS

The Mastery of the Air.

are always successful
in the struggle for
------ the --------
Mastery of the Air.

SEND US YOUR ENQUIRIES FOR:

Ventilation of Ships, Buildings and Mines,
Induced Draught on Boilers, Dust Removal,
High Pressure Fans for Forge Fires & Cupolas,
Air Washers for Cooling and Purifying the Air,
Fans for Removing Fumes or Steam,
Steam Heater Units for Heating Factories.

DAVIDSON & CO. LTD.,

Sirocco Works,

BELFAST.

“JOEL-FORS” Patent

Miners’ Electric Lamps

APPROVED BY H.M. HOME

OFFICE.

SALE OR
HIRE.

<■

ARRANGE
TRIALS.

TYPE 403 M.S

LIGHT.—11 Candle Power for 12 Hours.

WEIGHT.^ lb.

CELLS UNSPILLABLE AND INTERCHANGEABLE.

JOHN MILLS & SONS,

NE WCASTLE-ON- TYNE.

“MILLS, NEWCASTLE.’- Established 1828.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality-

COAL SCREENING » CONVEYING

w.

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.





CONSIDERABLY OVER

I 00	01 ABITO	NOW AT WORK IN

Wg	| %	GREAT BRITAIN

I oO	I IhFmIw I O	and the col°nies-

Estimates and Designs on application

HOPKINSQN

SAFETY BOILER
MOUNTINGS.

PATENT

ABSOLUTE

Water Gauge
for Water-Tube,
Lancashire and
Marine Boilers,
Locomotives
and Steam
Separators.

J. HOPKINSON & CO. LTD.,

Britannia Works, HUDDERSFIELD.

LONDON - GLASGOW - PARIS - PETROGRAD.
No. 400.

rHOPKINS®NS
PATENT

'Z H JO
8588