January 26, 1917.

THE COLLIERY GUARDIAN.

169 .

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Simplex Conduits, Limited,
GARRISON LANE, BIRMINGHAM.

113-117, Charing Cross Road, London, W.C. ■	6, White Horse Street, Leeds

16, Corporation Street, Manchester.	96, Whitechapel, Liverpool.

72a, Waterloo Street, Glasgow.	14, Heathfield Street, Swansea.

61-65, High Bridge, Newcastle.	4, Westgate Street, Cardiff.

10 & 11, Denmark Street, Bristol.	1, Crimon Place, Aberdeen.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality—

COM SCREENING«CONVEYING



SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.

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WORK IN
BRITAIN
COLONIES.

CONSIDERABLY OVER
100 PLANTS h
Estimates and Designs on application.

Agent for South Wales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mon.

B% TO 8% SAVING IN FUEL, or 12% TO 1 5% MORE STEAM

SINGLE HOOD

Circulator

39, Victoria Street, London, S. W.

MECHANICAL ENGINEERING OF COLLIERIES. T. c. enters

Vol. I., Price 21s. net. (By post 21s. 8d.Y.	Vol. II., Price 10s. 6d. net (By post Ils.).

SUPPLEMENTARY VOL.—Price 10s. 6d. net (By post Us.).

THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C.

QUALITY m SWITCH GEAR.

WRITE
for
LIST

No. 60
with

PRICES
and

LIQUID
SWITCH
GEAR
of
HIGH-
CLASS
MAKE
and
GOOD i
DESIGN.

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J. H. HOLMES & GO., Newcastle-on-Tyne.

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Hopkin son

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LATENT

SHELTERED SEAT TRYCOCK

For —-

GAUGES.

SPECIFY FIG. 6 68 5

Sent on Approval.

Fig. 6 68 5

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.

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

fi 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”

METAIi,
which does not cut and score
like gunmetal & other alloys.
Upwards of 500 tons of Standard Steel Castings kept in Stock.

We can give immediate delivery of iron and steel votives.

Illustrated Catalogue Post Free on Application.

J HOPKINSON & C° LD Huddersfield. I

Makers of Patent Safety Boiler 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 & Petrograd.

No. 374. ,

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