April 3, 1914.

THE COLLIERY GUARDIAN.

767

------ 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 11,000 Ovens have been placed
with us, of which number over 4,500 are repeat orders. These orders represent a capital
cost of over

500,000.

SIMILAR SUCCESS ATTENDS THE INTRODUCTION OF

HOPPERS’ NEW SYSTEM OF

BYE-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 NEW 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.

Telephone Nos. 1935 & 1331 (two lines).

Full Particular* on Application to—

THE HOPPERS COKE OVEN AND BYE-PRODUCT CO.,

CflOSSOJP Routl*	“KOCtiS,PSHEFFliELD.”

JOHN LAWSON & SONS,

Manufacturers of every kind of

STEEL STAMPS, LETTERS,
FIGURES, BRANDS, STENCIL

PLATES, &c.

Roebuck Letter Works, 26, Carver Lane, SHEFFIELD.

Established 1800.	—	Telephone No. 577.

BRASS TIME CHECKS £

GUTTER PICKS,

Mechanical Engineering of Collieries.

Yol. I., Price 21s. net.	Vol. IL, Price 10s. 6d. net.

Supplementary Yolume, Price 10s. 6d. net.

THE COLLIERY GUARDIAN CO. LTD.,

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

HOLLOW DRILL STEELS

AND

TWIST DRILL STEELS

OUTCLIFFE’S SPECIALITIES

COAL-CUTTERS

CONVEYORS

For Coal Faces, Gateways, and General Work.

HAULING ENGINES

For instantaneous extension of rope to replace horses.

THOMSON’S NON-OVERWIND

Simple, safe and sure.

WIRE BELTING for Conveyors.

AIR CURRENT REVERSING DOORS.

And other COLLIERY MACHINERY.

Buy

READY FOR USE IN ALL

MAKES OF MACHINES.

from the Makers:

RICHARD SUTCLIFFE,

HORBURY, nr. WAKEFIELD, ENGLAND.

THE HARDY PATENT PICK CO. L?

SHEFFIELD.