1168	[supplement page viii.] THE COLLIERY GUARDIAN.

June 7, 1918.

GRAMS:“RINGS7BRADFORD

PHONE: 1876.

are

4 absOhktid,'n'
he

r	THE

PERFECT-GAS-TIGHT-RING.

WAKEFEUJW^’ BRADFORD?



—“PROTAN”—

JFoia? BOILERS.

A Commercial form of TANNIC ACID (containing 48 50 % TANNIN).

In conjunction with Soda Ash

Enables the Boiler User to compound the most efficient
llllllllll SCALE REMOVER llllllllll
at only a fraction of the cost of Proprietary Compositions.

Composition can be based on analysis of water.

Samples and further particulars from

CLEMONS, MARSHALL & CARBERT,

Branch of The Yorkshire Dyeware and Chemical Co. Ltd., Leeds.

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONE-DUST

For FIERY WORKINGS.

BRICKMAKING
MACHINERY

Suitable for COLLIERY SHALES.

Richard Scholefield, Mnw, Leeds.

'Phone 1513.	ENQUIRIES SOLICITED. Wire •‘Brick. Leeds.”

f The >4
MIRRLEES o

l WATSON J

The Mirrlees Watson Co. Ltd.,
SPECIALISTS IN CONDENSING PLANTS,
Glasgow.

The Mirrlees-Leblanc

Multijector Air Pump.

Weight of Multijector
for 5,000 kw. is 97 lbs.

WALKER BROS. (Wigan)
LIMITED.
Codes: ABC 4th & Sth, Lieber’s, Western Union, Moreing & Neal, Mining.

AIR COMPRESSORS



with light Disc Valves to recent
Patents now at work (or on order)
indicating over

135,000 raising total output to 500,000 H.P.

PATENT UNLOADING DEVICE AND OUTPUT
REGULATOR, FOR POWER DRIVEN PLANTS.

Ventilating, Winding and
General Mining Machinery.

Pagefielcl Ironworks, WIGAN.

Telegraphic Address : “Pagefield, Wigan.”	Telephone : No. 14 Wigan (2 lines).