736

THE COLLIERY GUARDIAN.

April 11, 1913.

Merryweathers* Patent

“HATFIELD PUMP

WIERRYWEATHEH
LONDON

For Fire Protection,

Boiler Feeding,
Draining, &c.

COMPACT. LIGHT.

ECONOMICAL.

ROPES & BELTS

Treated with

CLING SURFACE

May be run SLACK WITHOUT SLIPPING and give
INCREASED POWER.

There are now many Imitations of Cling Surface, but they only
deceive and disappoint.

Can be driven by any motive power.

An Engineer writes“ I am pleased to inform you that the * Hatfield ’
Pump is working splendidly. I have never had the least trouble with it in
any way since it was fixed.’

WRITE FOR PAMPHLET 193P.

MERRYWEATHER & SONS, KiM"'

Photos of Belts and Ropes running SLACK in the most important works
in England sent on application to—

THOMAS & BISHOP, Sole European Agents,

Head Office—119-125, Finsbury Pavement, London, E.C. Teleg.—** Velcling, I/ondon.’

USE STEAM WAGONS FOR ECONOMY.

STEAM WAGONS, to carry 3 or 5 tons



MANN’S

PATENT STEAM CART
and WAGON CO. LTD.,
HUNSLET, LEEDS.

London Office—

9, Fenchurch Avenue, E.C.

STEAM CART, to carry 5 tons.

IMPORTANT NEW DEVELOPMENT IN GAS

ENGINE DESIGN.

■ 'i |

8

.-tT"

THE “DUPLEX” VALVELESS GAS ENGINE.

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

THE

Duplex

(Patent)

Valveless Gas Engine

The

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.

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

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

Write for Booklet.





MANCHESTER and LONDON.

Bentley Colliery, near Doncaster. Heapstead in Hennebique Ferro-Concrete, for Messrs. Barber, Walker & Co. 175 ft. x 30 ft. x 60 ft.
high, carrying pit head gearing. Foundation raft also in Ferro-Concrete. Front View.

s

THE

YORKSHIRE HENNEBIQUE

CONTRACTING Co. Ltd.,

Viaduct Works, Kirkstall Road,

LEEDS.

’Grams—“Ferro, Leeds.” ’Phone—4457 Leeds (two lines)

; HENNEBIQUE

FERRO-CONCRETE

The best construction for all buildings
and Engineering work.

FERRO-CONCRETE CHIMNEYS A SPECIALITY.

Used by the Admiralty, War Office, H.M. Office of
Works, and the leading Corporations and Companies.