November 27, 1914

THE COLLIERY GUARDIAN.

1117

MINE FANS

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality

COAL SCREENING & CONVEYING

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Deliver more air at less cost for power than
the ordinary paddle blade Fan. Sirocco Fans
can be arranged for reversal of air current.

DAVIDSON & Co. Ltd.,

Sirocco Engineering Works,

BELFAST.

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SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.





CONSIDERABLY OVER

100 PLANTS H

WORK IN
BRITAIN
COLONIES

Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 16, Fields Road, Newport, Mon,

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SURVEYING INSTRUMENTS	__



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Davis’s

Cranked

Dial.

Theodolites,
Levels,
Barometers,
etc.

DAVIS’S IMPROVED HEDLEY DIAL WITH CRANKED LIMB,
ENABLING SIGHTS TO BE TAKEN TO ANY DEGREE FROM

LEVEL TO 90 DEGS. UP OR DOWN.

Davis’s Surveying Instruments
are used in the majority of Mines in the
United Kingdom, the Colonies, and other
parts of the World.

PLOTTING INSTRUMENTS

for Railways, Mining Engineering, and Field work.

SEND FOR LIST No 411 A.

JOHN DAVIS & SON

I TH ALL SA,NTS WORKS, DERBY;

lUerUVI LIUii &17, VICTORIA St., Westminster, London, S.W.

“	Telegrams—“ Davis, Derby.”	Telephone—240 Derby

PATENT

SHELTERED SEAT TRYCOCK

WATER GAUGES.

>4' MgffljL,

SPECIFY FIG. 6685.

Sent on Approval.

Fig. 6685.

ADVANTAGES

NO ASBESTOS PACKING
TROUBLES.

No plugs to work loose
and leave the packing faces,
causing cutting and leakage.

No circular action to cause
grooving.

Easy method of operating,
as there is no packing fric-
tion to overcome.

Is not affected by expan-
sion.

Large outlet for discharge
of sediment, &c.

Self Cleansing.

Main valve opened and
closed at atmospheric pres-
sure, which overcomes the
cutting action of the steam
and water at the point of
opening and closing.

VALVE AND SEAT OF

HOPKINSON’S “ PLATNAM ”

METAL,
which does not cut and score
like gunmetal & other alloys.

Upwards of SOO tons of Standard Steel Castings kept tn Stock.

He can give immediate delivery of iron and sleet valves.

Illustrated Catalogue Post Free on Application.

J. HOPKINSON & C° LD

Makers of Patent Safety Kotler Mountings and Valves

For High Pressure Superheated Steam, High-class Exhaust and Water Sluice
Valves for Condensing Plants, &c., Automatic Exhaust Valves, Reducing
Valves, Steam Traps, &c., &c.

Depots and Showrooms—London, Glasgow, Edinburgh. Cardiff,
Oldham, Blackpool, Paris & St. Petersburg.

No. 306.