January 3, 1913.

THE COLLIERY GUARDIAN.

9

PNEUMATIC ASH TANK

COATED WITH

WABLES, DOVE & Co/s

— PATENT —

“BITUMASTIC”

Solution & Enamels.

The “World’s Record”
Anti-Corrosives.

Write for Descriptive Booklet to Original Patentees —

WAELES, DOVE & Co. Ld., Newcastle=on=Tyne.

Also at London, Liverpool, Manchester, Glasgow, Cardiff

Birmingham, Leeds, Hull, &c.

EVERY OFFICE ON THE TELEPHONE.	Telegrams: —“ BITUMASTIC.*’

STANLEY’S NEW PATTERN
TRANSIT THEODOLITE.

&

s TRADE

I

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 & Co. Lo.

Great Turnstile, Holborn, London, W.C.

Head Office & Show Rooms —
286, High Holborn, W.C.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality -

GOAL SCREENING & CONVEYING,

Sr .' J

SECTION OF SCREENING rLANT AT BENTLEY COLLIERY, DONCASTER



CONSIDERABLY OVER

inn pi int?

I UH I IffiHlili I 0 AND THE colon,es

Estimates and Designs on application

Agent for SouthjWales: A. LEIGHTON STEVENS, 15, Fields Road, Newport, Mod.

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS.	England.

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,

TRAMRAILS AND PERMANENT WAY RAILS, &c

<$> $

Example of 10 in. * 6in. 521b. R S Joists curved for Framework to Roadway.

«>

X

Pit Head Frame,

Erected in Works

for inspection.







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

STRUCTURAL STEELWORK FOR BUILDINGS, &c.

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

Rolls cut for Special Sections and to approved quantities.

Books of Sections and other information on application.

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

Roubaix Exhibition, 1911: “Grand Prix.”

PATENT

“MAC” VALVE.

Figuii'e 82200—Inside

Figure 8205—Outside Screw

Suitable for the
Highest Steam Pressures.

Fitted with

Hopkinson’s ‘ Platnam ”

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and valve are withdrawn,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

Hopkinson 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 p.irts is a frequent
occurrence. We have tried our “Platnam” Metal under severe conditions, and, have every
confidence in recommending 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 Ca*ting* Kept In *tocK.

JVe can give immediate delivery of iron and *teel Valve*.

Write for illustrated specifications and catalogues free.

J. HOPKINSON & 6° L" Huddersfield,

Maker* of Patent Safety Boiler Mounting* and Valve*

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 236 Oldham, Blackpool, Paris & St. Petersburg.