August 30, 1918.

THE COLLIERY GUARDIAN.

437

WALKER BROS. (Wigan)

LIMITED,

Pagefield Ironworks, WIGAN.

________________________________

New Patent Light Disc Valves
for Air Compressors.

Vertical Steam-driven Air-Compressing Engines,
with Two-stage Air Cylinders.

Installations now at work equipped with
the above valve indicating over
135,000 H.P.

PATENT UNLOADING DEVICE AND OUTPU1
REGULATOR FOR MOTOR DRIVEN PLANTS.

PLOWRIGHT BROS. LTD.,

Brampton Iron Works, Chesterfield.

Speciati ty-

COAL SCREENING & CONVEYING



A

SECTION OF SCREENING PLANT AT BENTLEY COLLIERY, DONCASTER.
_________________________________________





CONSIDERABLY OVER

inn piantc — =n

I UU I	I AND THE COLONIES.

Estimates and Designs on application.

° FROM STOCK

BRAND

UN ON

RED LABEL.

Dos Spukbs

9

‘DELIVERIES’





o O G ® G O o

^LBERTTROST&u!

H0PKINS0N

_________

VALVES

HOPKINSON-FERRANTI

PATENT STOP VALVE

SUPPLIED OR ON ORDER.

THE

h o p k i n son -f e R Banti - p aJ e n t	_____________

UPWARDS OF

30,000

_ HoumrdSt.	___

Sheffield.



J. HOPKINSON & CO. LTD
BRITANNIA WORKS,
HUDDERSFIELD.

LONDON - GLASGOW - PARIS - PETROGRAD.

No. 400.	____________________ _______