Avgust 7, 1914.

THE COLLIERY GUARDIAN.

335

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SOLE’
MAKERS

F. RED DAM AY & 2°

PENDLETON.

MANCHESTER.

LONDON OFFICE

50/l LIME ST.,E.C.

LEECH, GOODALL t Co.

LEEDS.

Telegrams :—
“Vertical, Leeds.”

Telephone :—1982, Leeds.

|LEXCH,GOODALL&C9

I	LEEDS.

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MAKERS AND ERECTORS OF

SCREENING PLANTS, PICKING BELTS, SCREENS,
PITHEAD GEARS.

BUNKERS, ROOFS, STEEL STRUCTURAL WORK, &c.

GAS RETORT INSTALLATIONS, CONVEYING PLANTS.

RepresentativesH. L. CHESTON, Clarendon House, Boston Spa, Yorks.

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ANNALS OF COALMINING & THE COAL TRADE.

By ROBERT L. CALLOWAY.	Price 25s. net.

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

limB-
iWiLIL

'iiWlIIW

'LOWER.

MEN

■RAISE

XSTEAD

Coal Mines
Regulation Act.

General Rule 95.

INDICATING

SIGNAL BELLS,

Mechanical or Electrical.

Price and detail on application.

E. C. THEEDAM LTD., DUDLEY.

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Established 1800.	—

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Price 3s. 6d. post free.

A Practical Handbook for Colliery Electricians.

Electric Circuit Problems

in Mines and Factories,

— BY —

ELLIS H. CRAPPER, B.Eng., M.I.E.E.,

Head of the Department of Electrical Engineering at the University of ShelKeld.

THE COLLIERY GUARDIAN CO. LTD.

30 & 31, Furnival Street, Holborn, London, E C.

TURBON.

The LATEST THING m FANS.

Equally suitable for Mine Ventilation, forced and induced
draught, or any other purpose.

Great strength, simplicity and silence.

Highest efficiency. Perfect balance at all speeds.

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Resists high temperatures without distortion.

No rivets in blades.

Manufactured by THE WADDLE PATENT FAN CO. LTD.,
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TURBON PATENT FAN CO. LTD.,

LONDON Address—	y y 7^ ’KT'FT T 'V'

34, Victoria Street, S.W.	A-dA-dAXM	X •