January 21, 1916.

THE COLLIERY GUARDIAN.

109

LOCOMOTIVES.

COLLIERY
HAULAGE
ENGINES

FOR

AIR, STEAM & ELECTRICITY.

FORGINGS
& REPAIR WORK.

HHEeWORTH i';



COAL
CUTTING
MACHINES
OF ALL TYPES.

MACHINE WORK OF
EVERY DESCRIPTION.

15,=^ YORKSHIRE ENGINE CO. LTD., H“™0RKS’

7 SHEFFIELD.

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

GEORGE BURNSIDE,

Burnside** Safety
Boring Affaratu*.

Used moat successfully
in tapping old Mine
Workings.

/or Catalogue.

Boring Tool Works, Shiney Row, Fencehouses,
Also Etv Guards fob Pit Ponhs. CO. DURHAM.

Handbook
C3 on Chain
Gearing
FR E.

NO/SELESS

TRANSMIT

98% of Power

OVENTRY Ti^oventryl
CHAINS Chain Co.,Ltd.
“ Coventry,
England.

LITTLE GIANT POWER HAMMER.

With or without individual motor drive.

400 R.P.IML.

Machine gun rapidity and precision.
See large advert, first issue each month.

Write your dealer, or to

MAYER BROTHERS CO.,

122 Rock St., Mankato, Minn., U.S.A.

900% ECONOMY.

Unique Patent Tub Bearings.

Dustproof, Foolproof, and Self Lubricating.
FROM 7/- PER SET OF FOUR.

Particulars—

The Lancashire Engineering Agency,
429, Corn Exchange Buildings, MANCHESTER.

PERFORATED PLATES

FOR

COAL SEPARATING
PROCESS.

THOMAS HUDSON LTD., Sheepford Iron Works, COATBRIDGE.

M. COULSON & CO. LTD.,

SPENNYMOOR,

Makers of

Coal Washers, Screening Plant, . .

Conveying, Elevating, and Crushing
Machinery, Tipplers, Tub Controllers,
. . Storage and Drainage Bunkers. . .

Replace parts and Repairs given Special Attention.	Estimates and Full Particulars on Application.

A
til
ill
11)1—.

Trade	|\| L	Mafk'

The Largest Manufacturers of

SURVEYING and g L
DRAWING INSTRUMENTS

in the World.

II

STANLEY LONDON.

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

Theodolites, Levels,
Mining Dials, Prismatic
Compasses, Plane Tables,
Drawing Instruments,
Drawing Office
Stationery, etc. All of
the highest quality.

W. F. STANLEY & CO. LTD..

Head Offices & 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 1J tons upwards 83 °/o 25

Dust from Yorkshire and other Shale— 1 to 1} 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

37, Walbrook, LONDON, E.Q.