July 2'4, 1914.

THE COLLIERY GUARDIAN.

191

ZERO

Banksman

APPROVED

WINDING
SIGNALS

complying with Rule 95,
General Regulations, 1913.

DAVIS’S

Self-contained

SOLENOID BELL

with DIAL INDICATOR

System 102.

Patent applied for No. 7241.

KEITH Centrifugal FANS.

SIIVIF*LE.

EFFICIENT.

INEXPENSIVE

A large single » inlet KEITH FAN with
6 0=H.P. motor and flexible coupling drive.

MULTIPLE CABLES DISPENSED WITH.

Can be worked off existing
electrical or mechanical wires.

KEITH MINE FANS in hand, single
and double inlet, for delivering up to
400,000 cubic feet of air per minute.

QUICK DELIVERIES.

Send for List 41 V.

JOHN DAVIS & SON

(Derby) LTD

ALL SAINTS WORKS, DERBY;

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

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

James Keith & Blackman C® L™

27, Farringdon Avenue, LONDON.

And at Newcastle, Glasgow, Manchester, Leeds, &c.

iillllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllllillllllllllllllllllilllllllllllllllllllllllLIlt1

SPECIFY and SEE YOU GET

WAILES, DOYE & CO.’S

“BliyMASTIC^
MM——■
FOR ALL COLLIERY IRONWORK.

STOPS ALL CORROSION.
SUPPLIED READY FOR USE.

Not affected by Chemical Fumes, Atmospheric Changes, &c.

Write now for Booklet “C,” to SOLE MANUFACTURERS—

WAILES, DOVE & GO. LD., Newcastle-on-Tyne.

TRAM
NR ILS

W"'-1

I J

BRADLEY PULVERIZER CO

37, WALBROOK, LONDON, E.C.

Also extensively used for grinding
COAL. LIMESTONE. PORTLAND CEMENT.
PHOSPHATE ROCK. ORES OF ALL KINDS.

PREVENT GOAL MINE EXPLOSIONS
by dusting your mine with stone ground in the
GIANT GRIFFIN MILL,
As supplied to the leading Collieries.

Advantages -

MAXIMUM PERCENTAGE OF “FLOUR” OR IMPALPABLE

MAXIMUM FINENESS.	POWDER.

MAXIMUM OUTPUT.

MINIMUM POWER.

MINIMUM WEAR AND TEAR.

No Auxiliary Apparatus required for
Finishing the Product.

Heavy Construction.

OVER 3,QUO CRIFFIN MILLS INSTALLED.

Full partic-ulars on application to—

THE-SPEC/flL'L/NES' WEM1NDLE
QUICKESTDEUVERY'GUARANTEED

frost’s
PATENT ,,

GALVANIZED
WIRE

DOG

ALBERT FR0ST&C9.

HOWARD STREET,

SHEFFIELD.

WIRE: ’’flLFRO,SHEFFIELD?
’PHONE: ,4366, CENTRAL.
CODE*. fl.B.C. 4-tn E9,