September 13, 1918.

THE COLLIERY GUARDIAN.

[supplement PAGE XV.]

579

Coal Saving

For Collieries.

Experience.

We have had many years experience
in investigating the working of steam
boiler-plants and in designing schemes
of reorganisation to obtain maximum
efficiency.

We have just published in “ Engi-
neering ” the results of the working of
250 typical steam boiler - plants in
Great Britain, representing 8 years
continuous working, and we shall be
very pleased to send you a copy free
of charge.

These results shew an average nett
working efficiency of 60 / for all indus-
tries, and in the case of collieries 50
We are able to reorganise a boiler-
plant to run on 70—75 % efficiency
under average conditions, representing
a saving on colliery boiler-plants of—
say 30 ?.

We shall be glad to explain our
proposition personally or by letter,
and are prepared to visit your
Colliery free of charge and give
you our opinion of the working
of your boiler-plant.

gioivnlu &

TECHNICAL CHEMISTS & ENGINEERS,
SPECIALISTS IN FUEL ECONOMY.

2, AUSTIN FRIARS, LONDON, E.C. 2.

Telephone __	-	-	-	6292 London Wall.

Manchester -	-	30, Cross Street.

. Glasgow ...	94, Hope Street.

Laboratories and Testing Station,

Church Street, Cheetham, Manchester.

John Tomks & C°
_____________

Manufacturers of

SPRINGS & SPRING WASHERS

For Engineering & General Use.

CST'FFB for abl

 i	PURPOSES

DAISYSTEEL & SPRING WORKS,

Daisy Walk, SHEFFIELD.

__________________________________________________________

___________

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AVOID ACCIDENTS by the Free Use of

&BRIDGES

HEYWOOD 7

IMPROVED

PATEN



THE SAFEST CLUTCHES MADE.

They are absolutely dependable, even when
applied to the heaviest loads, and may be
thrown into and out of gear in an instant
without any shock or jar taking place.

Illustration shows Clutch and Shell prepared
for Bolting to Winding Drum. Applied to old
Pulleys and Wheels without taking out of pit.

2OO page Catalogue ( C33) of Clutches, Pulleys
and Haulages, Post Free.

J}avid Bridge & C?b?

Castleton I ron Works,

Castleton, Manchester.

London Address,	35 Queen Victoria St; E.C.

=	5 =

=nillllllll!lllllllll||l|||llil_______
_______________________________________________________________________________________________________________________________________________________________

T. E. COPLEY & CO

Mowbray St., SHEFFIELD.

___________________

Manufacturers of—

COAL CUTTER PICKS,
MINING DRILLS,
SPECIAL TOOLS AND STEEL
OF ALL DESCRIPTIONS.

Tel. No. 4033 Central.

_________	__________________

THOMAS SUMMERSON & SONS LTD

ALBERT WORKS, DARLINGTON.

_____

Sidings

Contracted for

Complete.



Telegrams—“ Tones, Sheffield.” Telephone—4179 Central.	_____________________

No. 1.

No. 2	No. 3.

MANUFACTURERS of SWITCHES and CROSSINGS,

Chairs, Spikes, Fish Plates, Iron and Steel Castings.

FISH

PLATES and BOLTS for various sections of

____

M. COULSON ltd!;

SPENNYMOOR,

—	= MAKERS OF	—

Coal Washing and Screening Plant

Coke Oven Machinery

Gas Works & Chemical Works Plant

Ash Washing and Handling Appliances

&C.J &c.

Rail kept in Stock.

450 H.P. MAIN AND TAIL HAULAGE GEAR