738

THE COLLIERY GUARDIAN.

April 11, 1913.

FANS

The Gwalia Forge Co.,

Caergwrle, Wrexham, N. Wales.

For Mine Ventilation,
Induced Draught, &c., &c.





wk

S , A

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1
IMS



We also Specialise in

DUST REMOVAL & COLLECTION,
FORGES, HIGH PRESSURE FANS,
SINKING FANS, PIPING, &c.

The STANDARD ENGINEERING Co. Ld ,

LEICESTER.

ESTABLISHED OVER 250 YEARS.



Absolutely the
best tubs on
the market,
being stronger
in proportion
to their weight
than any other
make. :: ::

• % •

-

©■;l|

. ■■ '

- H

First=class ::
references
given if desired,
one colliery
alone having
purchased over
2,000 tubs
from us. :: ::

Caergwrle Steel Pit Wagons.

WE SPECIALISE IN

Colliery Tubs, Draw=Bars, Wagon Couplings,
Angle Work, Colliers’ Rakes & Baskets, Spades,
Shovels and Picks to any Pattern. Also all
kinds of Smith Work and Steel Forgings of
every description.	Prices on application.

Price 3s. 6d. post free.

A Practical Handbook for Colliory 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 Sheffield

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

NO MORE PIT CAGE ACCIDENTS!

Ascending
and
Descending
Cages
Safeguarded.

No
Interference
with
Winding.

Starting
in the
Wrong
Direction
Prevented.

1

S

“S?«

r -:"*

■

Safety
assured
with

‘THE

VISOR.’

The most

Effective

Machine on
the

Market.

Over 200
at work.

particulars to JOHN WOOD & SONS Ltd.,

Telephone : 55 Wigan.

Engineers, WIGAN. Telegrams: “Haulage, Wigan.”