March 14, 1913

THE COLLIERY GUARDIAN.

573

The PREMIER Screen in the WORLD

is Norton’s Patent Horizontal Main Screen.

REQUIRES NO SPECIAL FOUNDATION.

1 ft
r

NORTOMS. (TIVIOALI

. .	. TIPTON

or*

■■ '

...<■> ■ ■

Will work continuously WITHOUT BOLTIMC DOWH.

Will Screen more efficiently than any other screen.





Nearly 100 Screens now at work.

For PERFECT sizing & loading

USE

PULSATING CONVEYORS

AND

PULSATING LOADING JIBS

(NORTON’S PATENTS).

We are constructing and erecting more than one complete
Screening Plant every month. Capacities 2,000 to
5,000 tons per day.

NORTONS (TIVIDALE) LTD.

HECLA Works, Tipton, England.

TUBES FOR MINES—EDWIN LEWIS & SONS,

SEND FOR

PRICE LISTS

of every class of

TUBE

USED IN

MINING

WOLVERHAMPTON

H SCREWED. SOCKETED 8 FLAHGE-JOINTED

Telegrams—
Lewis, Wolverhampton.

Telephone—

No. 15 Wolverhampton.
Liverpool Warehouse—
58, South John Street.

ORIGINAL MAKERS.

PATENT ACME JOINT TUBES,

TUBES

up to any size.





London Office—

143, Cannon-st, E.C.

Extract from the article on “COAL”- The New Edition
(Eleventh) of the ENCYCLOPAEDIA BRITANNICA.

“ Authorities.—The most important new publication on
British coal is that of the Royal Commission on Coal
Supplies appointed in 1901, whose final report was
issued in 1905. A convenient digest of the evidence,
classified according to subjects, was published by the
Colliery Guardian newspaper in three quarto volumes
in 1905-1907..........”

Complete in Three Volumes, Bound in Cloth.
Price £2 (nett).

The Volumes may be had separately at the following Prices :—

Vol. I. 15s 9o. Vol. II. 15s. Vol. ill. 10s.

COAL

ECONOMY IN WORKING, PREPARATION FOR SALE,

TRANSPORT AND USE, FOREIGN COMPETITION.

Being a Digest of the Evidence given before the Royal
Commission on Coal Supplies, 1901-5.

EDITED BY

ALLAN GREENWELL, F.G.S., Assoc.M.Inst.C.E.,
M. Inst. M.E.

(Editor of the “ Colliery Guardian

London:

THE COLLIERY GUARDIAN CO. LTD.

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

MAPS of the BRITISH COALFIELDS.

STiotoing the Position of Collieries with regard to Railway
Communications, Canals and Shipping Ports.

Scale :—3 miles to an inch. (1) Scotland. (2) North of England.

(3) South Wales. (4) North Midlands. (5) South Midlands.

In sheet ............................. 4s.	each.

Mounted on Cloth, Rollers and Varnished	...	6s. „

Mounted on Cloth, and in Titled Cloth Case ...	6s. „

THE COLLIERY GUARDIAN CO. LTD.,

30 & 31, Furnival-street, Holborn, London, E.C.

i—i“TREFOR »—|
BORING and

MINING Co. Ltd.

(Societe Anonyme de Forage et
Entreprises Minieres),

41, HUE ROYALE, BRUXELLES.

CONTRACTORS FOR
DEEP BORINGS.

Wells drilled for petroleum
in all parts of the world.

Special outfit for coal borings to any
depth and of any diameter (Vogt’s
Patents).

BREJCHA’S PATENTS.

Boring to any depth without casings
and without reduction of diameter.
Speed record in England: Boring
Heswall (Cheshire), 3,400 feet in eight
months.

Shafts sunk by freezing
method.

Shafts sunk by cementing the watery
grounds (cementing and sinking
simultaneously).

Demy Octavo, 176 pages, Cloth.	Price 6s. 3d.

45 Original Photographs and Diagrams. (post free).

Miners’ Nystagmus:

Its Causes and Prevention,

By T. LISTER LLEWELLYN, M.D., B.S. (Loud.), &c.

WITH A PREFACE BY

Professor J. S. HALDANE, F.R.S., M.D.,

AND A LEGAL APPENDIX BY

DOUGLAS KNOCKER, M.B., Barrister-at-Law.

CONTENTS.

Description of the Eye—Anatomy : Physiology—(1) General
Description of the Disease—(2) Frequency and Resulting
Incapacity—(3) Historical Account of the Disease and
Theories of its Causation—(4), (5) and (6) Conditions
Determining the Occurrence of Nystagmus—(7) Diagnosis
and Prognosis—(8) The Etiology of Nystagmus—(9) Pre-
ventive Measures and Treatment—(10) Summary and
Conclusions — With Appendices: Legal Information —
Glossary—References and Bibliography—The Effects of
Deficiency of Oxygen on the Light of a Safety Lamp—
Test of Ceag Lamp.

THE COLLIERY GUARDIAN COMPANY" LTD.,

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

Price 10s. (10s. 7d. post free).

RECORD

OF THS

British Coal Dust Experiments.

128 Illustrations, consisting of Coloured Plates,
Photographs, &c.

Publishers: THE COLLIERY GUARDIAN CO. LTD.,

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