April 14, 1916.

THE COLLIERY GUARDIAN.

693

LOCOMOTIVES.

COLLIERY
HAULAGE
ENGINES

FOR

AIR, STEAM & ELECTRICITY.

FORGINGS
& REPAIR WORK.





COAL
CUTTING
MACHINES
OF ALL TYPES.

MACHINE WORK OF
EVERY DESCRIPTION.

15.1c°Xnohf^ YORKSHIRE ENGINE CO. LTD., HEADX“S’
uz . • . c wr	7 SHEFFIELD.

Westminster, S.W.	Telegrams “ Engine, Sheffield.”

“Spade” Washers

For the Scottish Tube Company’s Tubes,
and others.

JOHN E. KEIRBY & SONS LT°

SWINTON, near MANCHESTER.

Telegrams—“Keirby,” Swinton, Manchester. Established 1864.

PERFORATED PLATES

FOR

COAL SEPARATING
PROCESS.

(The word “SPADE” is a Registered Trade Mark.)

THOMAS HUDSON LTD.,

COATBRIDGE.

BOILER HOUSE ECONOMY.

The Heywood Patent Furnace Bars
and Smoke Burner Combined. . .

S

The illustration shows the Bars made in 5 ft. or 6 ft. lengths, with ribs cast on.
This Bar has been designed to meet the requirements of Collieries, Steel Works,
Forges, Locomotives, Steamers, and all other types of Furnaces that are very hard fired.

Write for Catalogue and price to—

THE “HEYWOOD” AIRTIGHT DAMPER CO. LTD.,

Grove Foundry, Gomersal, LEEDS.

-W .4*4^

•I*

A i

Standard M.P. Turbine.

STEAM

TURBINES.

High Pressure
Mixed Pressure
Low Pressure

FOR

Ironworks

AND

Collieries.

Reliable.
Economical.
Compact.

MECHANICAL ENGINEERING OF COLLIERIES. T. c. FBuyTERS

Vol. I., Price 2is. net (By post 21b. 8d.).	Vol. 11., Price ios. 6d. net (By post Ils.).

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

THE COLLIERY GUARDIAN CO. LTD.,

30 & 31, Furnival Street, Holboin, London, E.C.

Richardsons Westgarth & 0° L™

MIDDLESBROUGH. HARTLEPOOL. SUNDERLAND.

STANLEY

The Largest Manufacturers of SURVEYING and
DRAWING INSTRUMENTS in the world.

Stanley’s Telescopic Abney Level and
Clinometer.

Theodolites, Levels, Mining Dials,
Prismatic Compasses, Rods,
Tapes, Chains, Drawing Instru-
ments and Stationery. All of
the highest quality.

Please send for our “ K.12 ”
Catalogue, and compare our
prices with those of other
first-class makers.

W. F. STANLEY & CO. LTD.,

Head Offices and Showrooms:—

286, HIGH HOLBORN, LONDON, W.C.

GRIFFIN MILLS STONEDUST

No. 6 REPORT OF THE EXPLOSIONS IN MINES COMMITTEE,
whilst recommending a minimum of 50 °/o passing a 200 x 200 sieve, says
emphatically.—" THE FINER THE DUST THE BETTER,” con-
sequently, STONEDUST PRODUCED BY THE GRIFFIN MILL
SYSTEM IS THE MOST EFFICACIOUS PRODUCTION FOR

THE PURPOSE, SEEING IT PREPARES:—

Percentage Horse
Output per hour	Passing Power

200 x 200 Sieve Required

Dust from South Wales Shale—	1 to 11 tons upwards 83 °/o	25

Dust from Yorkshire and other Shale— 1 to 11 tons upwards 87 °/o	25

No other System of Pulverizing can approach the

GRIFFIN & GIANT GRIFFIN MILL

for Low Cost of Grinding and Fineness of Product.
----------------- FOR FULL PARTICULARS, APPLY ------
BRADLEY PULVERIZER Co.,
37, Walbeook, LONDON, E.C.