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[supplement page: tv.]

THE COLLIERY GUARDIAN.

June 21, 1918.

JOHN WOOD & SONS, L™

Engineers, BARLEY BROOK FOUNDRY, WIGAN.

Telephone—No. “ 55 ” Wigan.

Telegrams—“ Haulage, Wigan.”

1OO-H.P. “ENDLESS”

k	Fitted with

AUTOMATIC BRAKE









and Improved
“ OUTSIDE-
BAND’*
FRICTION
CLUTCH.













W1'

Haulage Gears of every type.

, PUMPING & AIR COMPRESSING ENGINES.

SURVEYING INSTRUMENTS

Davis’s

Cranked

Dial.

Theodolites,
Levels,
Barometers,
etc.

DAVIS’S IMPROVED HEDLEY DIAL WITH CRANKED LIMB,
ENABLING SIGHTS TO BE TAKEN TO ANY DEGREE FROM
LEVEL TO 90 DEGS. UP OR DOWN.

Davis’s Surveying Instruments
are used in the majority of Mines in the
United Kingdom, the Colonies, and other
parts of the World.

PLOTTING INSTRUMENTS

for Railways, Mining Engineering, and Field work.

SEND FOR LIST No. 411 A.

JOHN DAVIS & SON

fFlaifhiA I TH all saints works, derby ;

f. aJw! KJ 8 Lf a U ■ s & 17, Victoria St., Westminster, London, S.W.

Telecrams—“ Davi*, Derby.” Telephone—240 Derby.

CONTRACTORS FOR COMPLETE BOILER HOUSE EQUIPMENT.

MAKERS

LANCASHIRE.

CORNISH.

TYPES OF BOILERS,

SUPERHEATERS, ct»seXcs:

A



Established 1800.	Telegrams—“ Lettering, Sheffield.”

p»	w.	Al | Telephone No. 577.

Brass Time Checks

JOHN LAWSON & SONS,

Manufacturers of every kind of

STEEL STAMPS, LETTERS,

FIGURES, BRANDS, STENCIL

PLATES, Ac.

Roebuck Letter Works, 26, Carver Lane, SHEFFIELD.

LINES

WATER, STEAM, OIL, AIR, GAS, HYDRAULIC.

CONTRACTS COMPLETED THROUGHOUT UNITED KINGDOM.

J. W. HOUSTON & CO., PARTICK CROSS, GLASGOW.