January 9, 1914.

THE COLLIERY GUARDIAN.

113

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

withi 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

___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.

advantage:s 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.

'Full Particular* on Application to—

THB KOPPERS’ CORK OVEN AND BYE-PRODUCT CO.,

301, Glossop R(Hid, SHEFFIELD,

SPECIAL TOUGH

Telephone Nos. 1935 & 1331 (two lines).

Telegraphic Address—
“ KOCHS, SHEFFIELD.”

See RULE 15,	i.

SPECIAL ELECTRICITY IN MINES RULES.

“That Signalling Apparatus shall be so constructed and
worked that there shall be no open sparking.”

HARDY DRILL

DAVIS-FRYAR

MECHANO-ELEGTRIG SIGNALS

For Haulage Planes, &c., in Gassy Mines.
PATENT No. 59'9-

HARDY

Pull- wire. 5=

HIGH SPEED

Pull-wire.

J—
D

In Use
Throughout
the

AND

CAST STEEL

ALL SECTIONS and for

ALL PURPOSES

CANNOT BE EXCELLED.

The Hardy Patent Pick Co. Ld

Sheffield, England

I

'4

Oil Contact Chamber.

This System is considerably cheaper than gas-proof pushes, and
more efficient.

Arrangements can be made to see the System in operation in the mine.

SENDFORFIST No. 41 F.

JOHN DAVIS & SON

fOnnkiA I TH ALL SA,MTS WORKS, DERBY;

I ■ JRr lly 1	1 &J. ■ & U, Victoria St., Westminster, London, S.W.

\	& r	’ Telegrams—“Davis, Derby.” Telephone—240 Derby.