May 11, 181?.

THE COLLIERY GUARDIAN.

919

REG? TRADE MARK

SOLE
MAKERS

F. RED DAW AY & f?.

PENDLETON.

MANCHESTER.

LON DO N OFFICE

5O/l LIME ST., E.C.

Davis’s

Cranked

Dial.

Theodolites,
Levels,
Barometers,
etc.

DAVIS’S IMPROVED HEDLEY DIAL WITH CRANKED LIMB,
ENABLING SIGHTS TO BE TAKEN TO ANY DEGREE PROM
LEVEL TO 90 DEGS. UP OR DOWN.

Davis’s Surveying Instruments
are used in the majority of Mines in the
United Kingdom, the Colonies, and other
parts of the World.

PLOTTING INSTRUMENTS

for Railways, Mining Engineering, and Field work.

SEND FOR LIST Ro. 41/1 A.

JOHN DAVIS & SON

(Derby) LTD.

ALL SAINTS WORKS, DERBY;

& 17, Victoria St., Westminster, London, S.W.

Telegrams—“ Davis, Derby.”	Telephone—240 Derby

DUDLEY, Wore.,

Factors and Manufacturers of
Colliery Requisites.

Mechanical & Electrical SIGNAL BELLS.

Ordinary and Indicating Signal Bells (Mechanical
and Electrical) with Indicator and Non-accmnulative
Ringing Lever or Key,

ELASTIC ENAMELLED PLATES

FOR NOTICES IN COLLIERIES & MINES.

Abstract of C.M.R. Act, General Regulations,
Signals (Winding, Sinking & Haulage), Electricity
Notices, Restoration^ Plates,I'&c.

MECHANICAL ENGINEERING OF COLLIERIES. T. c. FBJTERS,

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

SUPPLEMENTARY VOL.—Price ios. 6d. net (By post 11b.).

THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C. 4

E. C. THEEDAM

LTD.

Coal Baskets, Steel

Chimneys, Coal

Rakes, Elevator Buckets, Mining) Kibbles,
Haulage Clips, Barrows, Pit Tubs, &c.

THUS OXLEY 1/

Iron, Steel & Machinery Merchants,

Shiloh Works, SHEFFIELD

BUYERS OF SCRAP IRON, STEEL,
METALS AND OBSOLETE PLANTS.

A CONTINUAL STOCK OF SECOND-HAND
MACHINERY THOROUGHLY OVERHAULED.
-LIGHT AND HEAVY SECTION RAILS. —

Telegrams—“IRONICAL, SHEFFIELD.”	Telephone-4630 (6 Lines).

London Office—133/136, High Holborn, W.C.

DON’T WASTE TIME

Use “^ASTXXJTS”

No TROUBLE
to FIT
or REMOVE.

No damage to
bolt.

Specified and used
by the
War Office
AND
Admiralty.

£■



and SAVE
TIME &
MONEY.

One firm use over
200,000 monthly.

IN USE on over

60 Collieries.

SAMPLES, Calendar and Matchcase, FREE.

---- We develop and purchase good mechanical patents. -

“ FASTNUT ” Ltd., 115, Newgate St, London, E.C.

Rr@m g Wade

AIR. COMPRESSORS

--------o----

Works:

HIGH WYCOMBE.

I

Totally Enclosed
and Perfectly
Dustproof.

Need the minimum
of attention.

Particularly suit-
able for Dusty
situations.

MICHELL

PATENT

THRUST
BEARINGS.

SIZES :

5 to 1,000 c. ft.

ANY DRIVE,

Fixed or Portable.

HYATT

ROLLER
BEARINGS.

EFFICIENT
e
DURABLE
e
ACCESSIBLE