April 18, 1913.

THE COLLIERY GUARDIAN.

835

_ _____	. _

NEW PERMITTED LIST

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WHAT NOBELS CAN SUPPLY

DYNOBEL

FOR STONE WORK & HARD COAL

MAXIMUM STRENGTH

MINIMUM FUMES ZZ

WATERPROOF ZZ ZZ

CAMBRITE

FOR LIGHT RIPPINGS

& ROUND COAL

oz



NOBEL'S EXPLOSIVES COY. LTD. 195 WEST GEORGE ST. GLASGOW.

NOHEX

A COVERING for COR-
RUGATED IRON. Can
show corrugated sheets
painted in 1903 with it.

G. i T. EARLE (1912) LU, HULL.

THE HOLLAND DRILLING CO.,

HEIiRI.EN, HOLLAND.

CONTRACTORS for deep Borings for Oil, Coal, Gas and
Minerals.—Contractors to the Dutcu Government.

SPECIALISTS in Shaft Sinking through Quicksands
by freezing systems.

M ANUP ACTUKERS of combined Rotary and Percussion
Drilling Plants for all depths to 6,000 feet, with Mud
or Saline Plush.

THE HOLLAND CORE BARREL enables Cores to be
extracted from soft formations and mineral deposits.

For further particulars apply to—

The Manager, Department “C,”

JOHN WELLS, Cross Keys House,

56, Moorgate Street, London, E.C.

Telephone—2273 Wall.	Telegrams—" Drillistic, London.”





____________________________________

H. & R. Waterfall
& Barber,
PROMETHEUS WORKS,
Bridge Street, SHEFFIELD.

COAL-CUTTER PICKS &
STEEL FOR COAL-CUTTER PICKS.
“MAGIC” BRAND FILES.
“MAGIC” TOOL STEEL.
“NIAGARA” HIGH SPEED
STEEL.
Also BEST CAST STEEL for
all purposes.

Demy Octavo, 176 pages, Cloth.

45 Original Photographs and Diagrams.

Price 6s. 3d. (post free).

MINERS’ NYSTAGMUS . Its Causes and Prevention.

By T. LISTER LLEWELLYN, M.D., B.S.(Lond-), &c„ &c.

With a Preface by Professor J. S. HALDANE, F.R.S., M.D.,

And a Legal Appendix by DOUGLAS KNOCKER, M.B. (Lend.), M.R.C.S., L.R.CP., D.P.H., Barrister-at-Law.
__________________________________

CONTENTS.

Introduction — Description of the Eye —
Anatomy : Physiology.

Chapter 1.—General Description of the Disease.

Chapter 2.—Frequency and Resulting Incapacity.

Chapter 3.—Historical Account of the Disease
and Theories of its Causation

Chapters 4, 5 and 6.—Conditions Determining
the Occurrence of Nystagmus.

Chapter 7.—Diagnosis and Prognosis.

Chapter 8.—The Etiology of Nystagmus.

Chapter 9.—Preventive Measures and Treatment.

Chapter 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.

_______________________________________________________________________

I HE COLLIERY GUARDIAN COMPANY LIMITED, 30 & 31, Furnival Street, Holborn, London, E.C.