56

THE COLLIERY GUARDIAN.

July 9, 1915.

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NEW BRITISH PERMITTEDS

THAMES POWDER N?2

Charge Limit 22 Ounces
NEEDS NO THAWING

BRITONITE N?3

Charge Limit 24 Ounces
THE EXPLOSIVE FOR COAL

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SURVEYING INSTRUMENTS

SUTCLIFFE’S

Davis’s

Cranked

Dial.

Theodolites

Levels.

Barometers

COAL CUTTERS,
DISC & CHAIN TYPES, ..
pattern, for thin or thick seams, with shallow or deep cuts.
Compressed Air or Electrical Drive.

Coal-Face Conveyors, unrivalled In
capacity, constant In work, noiseless In the face and most
easily moved forward.

Roadway Conveyors, which are moved
freely from the face to admit ripping In the gateway.

Hauling Gear,

to keep a constant supply of tubs

between the engine plane and coal face with Instantaneous

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

extension of endless rope.

Wire Belting,

for conveyors of all kinds.

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

Thomson’s Non-Overwind,

simplest, safest, surest, and cheapest.

Sutcliffe’s Universal Sounding

PLOTTING INSTRUMENTS

for Railways, Mining Engineering, and Field work.

SEZINTD FOR LIST Ro. 41/1 A.

JOHN DAVIS & SON

I Tn ALL SAINTS WORKS, DERBY;

I LIDrUy I L. ■ U■ ■ & 17, Victoria St., Westminster, London, S.W.

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

& Displaying Signalling

Apparatus,

tion 85 of the MINES ACT.

fully complying with Regula-

NOTE.—The above machinery is all patented or protected and makers
or users of infringing articles will be liable to be prosecuted.

FULL PARTICULARS FROM

RICHARD SUTCLIFFE,

Universal Works, HORBURI, WAKEFIELD, England.