February 20, 1914.

THE COLLIERY GUARDIAN.

131

HARDY DRILL

SPECIAL TOUCH.

In Use

Throughout

HARDY



HIGH

AND

SOLE

MAKERS

F. REDD/WNAY & L°

PENDLETON.

MANCHESTER.

LON DO N OFFICE

5O/l LI ME ST., E.C.

ALL SECTIONS and for

ALL PURPOSES.

CANNOT BE EXCELLED.

The Hardy Patent Pick Co. Ld.

Sheffield, England.

Price 3S. 6d. post free.

A Practical Handbook for Colliery Electricians.

ELECTRIC CIRCUIT PROBLEMS

in Mines and Factories.

— BY —

ELL15 H. CRAPPER, B.Eng., M.I.E.E.,

Head of the Department of Electrical Engineering at the University of Sheffield

THE COLLIERY GUARDIAN CO. LTD.,

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

Established 1800.

BRASS TIME CHECKS

JOHN LAWSON & SONS,

Manufacturers of every kind of

STEEL STAMPS, LETTERS,
FIGURES, BRANDS, STENCIL
PLATES, &c.

Telephone No. 577.

.STOP,

MEN 1

ONj

JWISE

\STEftD

Roebuck Letter Works, 26, Carver Lane, SHEFFIELD.

E. C. THEEDAM

Coal Mines
Regulation Act.

General Rule 95.

INDICATING

SIGNAL BELLS.

Mechanical or Electrical.

Price and detail on application.

LTD., DUDLEY.

FERRO-CONCRETE

CONSTRUCTIONS.

Buildings of every description, Water Towers,
Bridges, Pile Foundations, Headgears.

THE

Yorkshire Hennebique Contracting Go. Ld.,

Kirkstall Road, LEEDS.

________________

NEWTON, CHAMBERS

& Co. Ltd.,

THORNCLIFFE IRONWORKS, near SHEFFIELD.

ESTABLISHED 1793.

TANK in Cast Iron or Steel. GENERAL CASTINGS, CONSTRUCTIONAL STEELWORK

CONTRACTORS to the ADMIRALTY, WAR OFFICE, and CROWN AGENTS for the COLONIES.

Telegrams—‘‘NEWTON, SHEFFIELD.”	Telephone No. 2200 Two Lines.

Galvanized
Sanitary
Pans
complete
with Cover
(To comply
with the Coal
Mines Act.)
From
2 6
each.

Also maker of Dust Bins, Strong- Buckets, Chains, .
Wrot Nails, etc. Please enquire prices.

THOS. A. BRETTELL,

Quarry Bank, S. STAFFS.

Established 1884.

Autom atic Detachment

The 1911 lever has large lateral stops and *
wedge-shaped head

Drop-forged shells (two sizes), levers (fow
sizes), catches and couplings,

SMALLMAN HAULAGE CLIPS

New Model; Nine Sizes

Patented 1902, 1906 and 1910

Illustrated Catalogue	Clips can be had without catches

Patentee and Sole Manufacturer;—

JAMES W. SMALLMAN, NUNEATON, England