April 4, 1913.

THE COLLIERY GUARDIAN.

685

__

HAULAGES

AND

THREE-THROW PUMPS

TO DRIVE BY

Air, Steam or Electricity.

BRIQUETTE MACHINERY.
IRON « STEEL FORCINGS.

HAMMERED SHAFTS IN STOCK
up to 16 in. diameter.

1

Turn Waste Into Cash

THE

USKSIDE ENGINEERING

CO. LTD.,*ijcmu
Newport, Mon.

UTILISE the heat in your exhaust steam

—make it do good work—send those
waste heat units wherever you want heat,
and thus effect a large save with your plant.

The Exol system is the only successful
system that makes possible the rational
utilisation of heat in the exhaust—it cleans
steam—it extracts oil for re-use—it keeps
boilers clean—it saves money for you— and
all for nothing, too !

Users of the Exol System now get full heat value
out of the coal they burn, and remember, only
the Exol System makes this save possible.

Get to know more about this system.

Send for free, interesting booklet—to-day—
NOW!

Exol Company, 66, Fenchurch St.,London,E.C.

The Gwalia Forge Co.,

Caergwrle, Wrexham, N. Wales.

ESTABLISHED OVER 250 YEARS.

£0

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

First-class ::
refe rences
given if desired,
one colliery
alone having
purchased over
2,000 tubs
from us. :: ::

Caergwrle Steel Pit VIZagons.

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 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 ShelRetd*

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

1

Walter Sgott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, Ac.

Example of 10 in. x 6 in. * 421b. R.S. Joists carved for Framework to Roadway.

Pit Head Frame,
k Erected in Works
for inspection.

■ / ♦

<$> \	I

<$> \	I

I

® ffi.

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS, Ac.

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

Mild Steel Blooms, Billets, Slabs, Tinbars. Rounds & Flats.
Rolls cut for Special Sections and to approved quantities.

Books of Sections and other information on application.