February 14, 1913

THE COLLIERY GUARDIAN.

325

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, ftc.

iSsfe

Head Frame.

Erected in Works
for inspection.

Example of 10 in. * 6 in. 421b. R.S Joists curved for Framework to Roadway.

DOLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS, &c.

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

Mild Steel Blooms, Billets, Slabs, Tinbars. Rounds & Flats.

Roils cut for Special Sections and to approved quantities.

Books of Sections and other information or, application.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield

Speciality -

COAL SCREENING & CONVEYING.

■ < V,’. '*

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER,



CONSIDERABLY OVER

‘fOO OS ft	NOW AT WORK IN

VI M	I % GREAT BRITAIN

IwW I i Hffl I O	AND THE colckies

Estimates and Designs on application.

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

STANLEY’S NEW PATTERN
TRANSIT THEODOLITE.

STANLEY

The largest manufacturers of
Surveying and Drawing Instruments
In the World.

Drawing Office Stationery of all kinds supplied
on the most favourable terms
A very large stock kept.

Please ask for our “K12” Catalogue,
and compare our prices with those of
other first-class makers.

W. F. STANLEY 4 Co. to.

Gt. Turnstile, Holhorn, London, W.C.

Head Office & Show Rooms—

286, High Holborn, W.C.

WATTLES, DOVE & Co.’s
Patent BITUMASTIC Solution
---------------- GIVES ---

PERMANENT PROTECTION FROM
CORROSION TO ALL IRONWORK.

A BRILLIANT BLACK COLOUR.	SUPPLIED READY FOR USE.

EASILY APPLIED BY UNSKILLED LABOUR.
CHEAPER THAN ORDINARY OXIDE PAINTS, OWING TO ITS
GREATER COVERING CAPACITY AND LASTING QUALITIES.

WRITE FOR PAMPHLET OF FULL PARTICULARS TO
Head Office-NE WCASTLE-QN^TYNE.
Also at London, Liverpool, Manchester, Glasgow, Cardiff, Birmingham, Leeds,

Hull, &c.

Every Office on the Telephone	- Telegrams “ BITUMASTIC.”

Brussels Exhibition: “Grano Prix.” Allahabad, 1910.

Boubaix Exhibition, 1911: “Chand Prix.”

PATENT
“MAC” VALVE.

Figure 8200—Inside Screw

Figure 8205—Outside Screw

Suitable ‘for the
Highest Steam Pressures.

Fitted with

ffopkinson’sPlatnam ”

Metal Renewable Valve
and Seat.

All parts interchangeable.

All joints made by metallic
contact, thereby obviating the
necessity of using jointing
material.

By removing the cover the seat
and valve are withdrawn,
enabling new parts to be in-
serted in about a minute’s
time, and without the neces-
sity—as with ordinary valves
—of removing the valve body
from its fixed position.

The Renewable Valve and Seat is made of

HcrplcixisoxA’s “Platnam” Metal

which is suitable for superheated steam and bad waters.

There are many valves with renewable valve and seat upon the market, but under modern
conditions and high pressures do not last any length of time owing to the deterioration which
takes place on the valve and seat, and consequently the renewing of the parts is a frequent
occurrence. We have tried our “Platnam” Metal under severe conditions, and,have every
confidence in recommendmg it to work under high temperatures. The “MAC ’ valve has
been designed to adopt this metal for the renewable valve and seat.

Upward* of 500 ton* of Standard Steel Casting* Kept in *!ork.

We can give Immediate delivery of iron and steel l alve*.

Write for illustrated specifications and catalogues free.

J. HOPKINSON a C° La Huddersfield,
Maker* of Patent Safety Koller Mounting* and I alve*

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 & Showrooms —London, Glasgow, Edinburgh, Cardiff,
No. 286. Oldham, Blackpool, Paris & St. Petersburg.