March 27, 1914.

THE COLLIERY GUARDIAN.

673

ELECTRIC POWER

HOLMES-CLAYTON A.C. MOTORS.

CASTLE D.C. MOTORS.

MINING SWITCH GEAR.
All New Patterns.

Ask for our Mining Pamphlet.

J. H. HOLMES t CO. “

CORES! CORES! CORES! CORES!

THE

NEW CALYX DRILL & BORING C° LD

120, East Ferry Road. Millwall, LONDON, E.

BORING FOR COAL AND
MINERAL PROSPECTING,
ARTESIAN WELLS, &c.

LARGE CORES A SPECIALITY.

Patent Appliances for ensuring
the verticality of bores.

CONTRACTS COMPLETED
TO DATE-

60,000 ft., from 500 to 3,600 ft.

Core of 8 in. diameter has been
produced at a depth of 3,000 ft.
by this system.

Estimates given for any depth
or size.

Complete Drilling Outfits Supplied
for Foreign Contracts.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciality

GOAL SCREENING & CONVEYING.



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SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER

CONSIDERABLY OVER

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IUU I LHIh I O AND THE colonies

Estimates and Designs on application.

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

Contractors’ Plant for Sale.

TO BE INSPECTED AT

JOHN AIRD & CO.’S DEPOT, FULHAM.

6-wheel Coupled LOCOMOTIVE, 12 in. cylinder, 17 in. stroke, copper firebox and
brass tubes, 5 ft. 8|in. gauge

6-wheel Ditto, 11 in. cylinder, 18 in. stroke.

5-wheel Ditto, 8 in.	„	15 in.	„

5-wheel Ditto, 10 in.	„	15 in.	„

and several others, also

PORTABLE ENGINES, from 6-h.p. to 30-h.p., all in first-class condition, ready
for work.

25-h.p. PORTABLE BOILER by Davey, Paxman & Co., for 100 lb. w.p.

Several Dunbars & Rustons STEAM NAYYIES.

Gwynnes and other PUMPS.

Sissons & White Patent STEAM PILE DRIVERS,
and a large assortment of various other plant all to be sold at very low
prices.	______________________________

APPLY—

GEORGE COHEN, SONS & CO.,

6oo, Commercial Road, Stepney, E.

IRONWORK DOES NOT CORRODE

WHEN COATED WITH

“ BITUMASTIC SOLUTION.

The ONLY Anti-Corrosive

THAT IS NOT AFFECTED BY CHEMICAL
FUMES, SMOKE FROM ENGINES, . . . .
ATMOSPHERIC CHANGES, &c„ &c. . . .

WRITE NOW FOR DESCRIPTIVE BOOKLET TO
PATENTEES AND SOLE MANUFACTURERS—

WAILES, DOVE & Co. Ltd.,

Newcastle-on-Tyne, London, Liverpool, Manchester,
Glasgow, Cardiff, Birmingham, Leeds, Hull, &c.

Every Office on the Telephone.	Telegrams—“BITUMASTIC.”

Brussels Exhibition: “Grand Prix:-

Roubaix Exhibition, 1911: ‘‘Grand Prix.”

LATENT

“MAC” VALVE.

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Figure
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Suitable for the
Highest Steam Pressures.

Fitted with

Hopkinson’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.

8200—Inside

8205—Outside Screw

The Renewable Valve and Seat is made of

kinson’s “ Platnam ” IVIetal

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” Metafl 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.

Upwards of 500 tons of Standard Steel Castings kept in stock.

We can give immediate delivery of iron and steel Valves.

Write for Illustrated Specifications and Catalogue No. 66o, 4th edition, post free.

J. HOPKINSON & G? L° Huddersfield,

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 & Showrooms—London, Glasgow, Edinburgh, Cardiff,
No. 275.Oldham, Blackpool, Paris & St. Petersburg.