262

[supplement PAGE XVI.]

THE COLLIERY GUARDIAN.

August 2, 1918.

EWART’S TYPE CHAINS

COLLIERIES and MINES,

For

Sprocket
Wheels.

&c.

Elevator

Buckets.

EASY MEANS FOR REVERSING AIR CURRENT.

Jjir

Four Cylinder Triple Expansion Engine with Corliss Valve Gear.

WALKER BROS. (Wigan)

LIMITED,

Pagefield Ironworks, WIGAN.

“ Indestructible ” Type

VENTILATING FANS

For Steam or Motor Driving.

Exhausting Capacity to Date—

OVER 100,000,000 OF AIR
CUBIC FEET PER MINUTE

AIR COMPRESSING, WINDING,

------------ AND -

GENERAL MINING MACHINERY.

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONE-DUST

For FIERY WORKINGS.

BRICKMAKING
MACHINERY

Suitable for COLLIERY SHALES.

Richard Scholefield, Engineer, Leeds.

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

—“PROTAN”—

For 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 he based on analysis of water.



DAVIS’S DEPUTY

OR

FIRE TRYER’S LAMP

(flame)

Gives greatly
increased light
over ordinary
Marsaut Lamp
without the
increase of
extra parts or
consumption
of more oil.

Send for Pamphlet 41 L and
Copy of Report of Test by
Dr. HENRY BRIGGS.

Samples and further particulars from

CLEMONS, MARSHALL & CARBERT,

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

JOHN DAVIS A SON

fRarhiA I TO all saints works, derby ;

I UDI UV I Jw 1 U ■	17, Victoria St., Westminster, London, S.W. 1

9 Telegrams—“ Davis, Derby.” Telephone—240 Derby.