426

THE COLLIERY GUARDIAN.

February 28, 1913.

M

IMPORTANT

NEW DEVELOPMENT IN GAS

ENGINE DESIGN

THE

Duplex

(Patent)

Valveless Gas Engine

THE DUPLEX" VALVELESS GAS ENGINE.

The simplest and therefore the most reliable Engine on the market.

EDWIN LEWIS & SONS,

WOLVERHAMPTON

ORIGINAL MAKERS.

NO

NO

NO

NO

NO

NO

ADMISSION VALVES.

EXHAUST VALVES.

CAMS.

SIDE SHAFTS.

VALVE POCKETS.

INTRICATE CASTINGS.

Easy to Lubricate. Easy to Overhaul. Steady Running.

The “ Duplex ” represents the highest standard of Gas Engine Construction.

In Single Units from 200 H.P. up to 4,000 H.P. or larger if required.

Write for Booklet.

daflicr&Platt,E

MANCHESTER and LONDON. =
MBmEHHHHKSKaSSanSHKHnmaaHHSHHma

Telegrams—

“ Lewis, Wolverhampton.’
Telephone—

No. IS Wolverhampton,
Liverpool Warehouse—

58, South John Street.

London Office—

143, CANNON STREET. E.C.

TUBES

For Compressed Air,

Water or Steam,
or any Description of

COLLIERY

WORK.



NEWTON, CHAMBERS

“ & Co. Ltd.,



THORNCL1FFE IRONWORKS,

ESTABLISHED 1793.

Telegrams—“ NEWTON, SHEFFIELD.’’ 	_______

MANUFACTURERS OF

near SHEFFIELD.

Telephone—No. 2200 (Two Lines).









PIPES & FITTINGS

For Gas, Water & Steam.

STRUCTURAL STEELWORK

Girders, Roofs, Bridges.

TANKS

In Iron or Steel.

HIGH-CLASS CASTINGS

For Machinery and Engine Cylinders.

WHEELS

BAR WEIGHTS

PUMPS