March 20, 1913.

THE COLLIERY GUARDIAN.

627

--- THE -----

Koppers’ Coke Oven
has been proved to be the most successful on the market, as is evidenced by the fact that in
the comparatively short period of ten years orders for over 10,000 Ovens have been placed
with us, of which number over 4,250 are repeat orders. These orders represent a capital
cost of over	___

<£8,500,000.

-- SIMILAR SUCCESS ATTENDS THE INTRODUCTION OF -

KOPPERS’ NEW SYSTEM OF
RYE-PRODUCT RECOVERY.

In the New System the Scrubbing process is entirely dispensed with, and the Ammonia is
recovered direct from the Gas in the form of Sulphate.

ADVANTAGES OF »E~W SYSTEM

Effluent Liquor reduced by 50 per cent, and upwards.
Great Saving In Steam Consumption.

Greater Yield of Sulphate and Benzol.

Consumption of Water is considerably Reduced.
Less Labour Cost.

Plant is Simpler to Operate, and requires less Supervision.

Plants already at work and under construction to deal with the Gases evolved from upwards of

25,000,000

tons of coal per annum.

JF’uW Particulars on Application to—

THE KOPPERS’ COKE OVEN AND BYE-PRODUCT CO.,

Telephone Nos. 1935 & 1331 (two lines). 301, Glossop Road, SHEFFIELD.

Telegraphic Address—
“KOCHS, SHEFFIELD.”

Mechanical Engineering of Collieries. s"X»“Sym

Vol. I., Price 21s. net. Vol. II., Price 10s. 6d. net.
Supplementary Volume, Price 10s. 6d. net.

THE COLLIERY GUARDIAN CO. LTD.,

30 & 31, Fumival Street, Holboro, London, E.C.

The Gwalia Forge Co.,

Caergwrle, Wrexham, N. Wales.

ESTABLISHED OVER 250 YEARS.

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

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.

HARDY DRILL

HIGH SPEED

SPECIAL TOUCH.

In Use

Throughout .

the

AND

CAST STEEL

HARDY

ALL SECTIONS and for
ALL PURPOSES.

CANNOT BE EXCELLED.

The Hardy Patent Pick Co. Ld.

Sheffield, England.