February 7, 1913.

THE COLLIERY GUARDIAN.

273

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.









THE

USKSIDE ENGINEERING

CO. LTD.,
Newport, Mon.

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 Sheffield,

THE COLLIERY GUARDIAN CO. LTD.,

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

The Gwalia Forge Co.,

Caergwrle, Wrexham, N. Wales.

ESTABLISHED OVER 250 YEARS.

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

G>

©

O

St®

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

Caergwrle Steel Fit 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.

□

What Would

You Think ?

WHAT would you think of a
’ ’ man who threw away more
than half his profits every week ?

Very little, eh !

Do you know, this man, and he who
spends large sums of money on coal to
provide heat to raise steam, and then lets
more than.three-quarters of the heat in
the coal pass off with the exhaust, are
one and the same ?

Just follow these figures and learn how.

Now, out of every 1,000 heat units
given off by coal burnt under boilers, 965
pass off with the exhaust—absolutely
wasted. Think what this means in actual
cash per annum I Roughly speaking it
represents with coal at 20/- per ton a clear loss of
17/- of heat with every ton burnt. It seems
incredible that steam users should be content to
waste heat like this. They should instal the
“ Exol” System, which stops this waste. It saves
money; it saves coal; it lengthens boiler life ; it
actually pays dividends, and is the only efficient
system, fully guaranteed to make possible the
safe and successful utilisation of heat in exhaust
steam.

Write for “ L. S. D. and Exhaust Steam ’
booklet, which is full of proof and interesting
matter in regard to this unique system.

Send a postcard for this free book to-day—
NOW !

EXOL COMPANY, 66, Fenchurch Street,
London, E.C.

□I	-	la

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

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

Pit Head Frame,
k Erected in Works
for inspection.

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

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS, &c.

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.