April 13, 1917.

THE COLLIERY GUARDIAN.

743

Koppers’ Coke Oven

Is undoubtedly the most successful Bye-Product Oven on the market.

Since its introduction a little over 10 years ago there have been built

15,000 KOPPERS’ OYENS.

KOPPERS’ OVENS ARE AT WORK HEATED BY
PRODUCER GAS AND BLAST FURNACE GAS.

Koppers’ Direct recovery process
fS THE SIMPLEST ANO MOST EFFICIENT
SYSTEM OF AMMONIA RECOVERY.

PLANTS ERECTED FOR THE RECOVERY OF
BENZOL & TOLUOL, FOR TAR DISTILLATION &
THE MANUFACTURE OF SULPHURIC ACID.

'	" Full particulars on application to -■

The Koppers' Coke Oven and Bye-Product Co.

....TSr.XW,,	301, GLOSSOP ROAD, SHEFFIELD. -SSSTSfiSKI-

M. COULSON & CO. LTD.,

SPENNYMOOR,

Makers of

Coal Washers, Screening Plant, . .

Conveying, Elevating, and Crushing
Machinery, Tipplers, Tub Controllers,
. , Storage and Drainage Bunkers. . .

Replace parts and Repairs given Special Attention.	Estimates and Full Particulars on Application.

-■Wai

CEMENTATION and
CHEMICAL TREATMENT

YEARS of STUDY
and EXPERIENCE
HAVE BROUGHT
MY SYSTEM OF
CEMENTATION
TO PERFECTION.

TO COLLIERY PROPRIETORS.

Shafts sunk, tunnels driven, and
other mining constructions carried
out in difficult and very wet ground
by the best method. Success guar-
anteed.

18 shafts completed in England,
and 7 in progress.

Ferro-Concrete Lining a speciality.

Feeders of water in shafts or levels
effectually treated.

ALBERT FRANCOIS, ^doXsteT

Telegrams—“Francois, Doncaster,”	Telephone—4 08 Doncaster.

SPECIAL Self-contained MACHINE for CORRECT GRINDING of

STONEDUST

For FIERY WORKINGS.

BRICKMAKING
MACHINERY

Suitable for COLLIERY SHALES.

Richard Scholefield, Wriii Leeds.

■Phone 1513.	ENQUIRIES SOLICITED. Wire “Brick, Leeds.”

Partners: Albert J. Francois (Belgian); Thomas Blandford.