764

[supplement PAGE IV.]

THE COLLIERY GUARDIAN.

April 12, 1918.

“SIMPLE! CIRCULATOR” j

FOR EFFICIENCY AND ECONOMY.



THE

LONDON SIMPLE! ENGINEERING C? L

FENCHURCH STREET

LONDON

CULLUM STREET

Telephone—
CENTRAL 11029

Telegrams—

LONPLET, FEN, LONDON

. ' 10%to15%M0RE STEAM

'5%to8%SAV!NGinFUEI/"

WALKER BROS. (Wigan)
LIMITED,
PagefteSsS Ironworks, WSGAN.
______

66 Indestructible ” Type

VENTILATING FANS

For Steam or Motor Driving.

EASY MEANS FOR REVERSING AIR CURRENT.

Four Cylinder Triple Expansion Engine with Corliss Valve Gear.

Exhausting Capacity to Date—

OYER 100,000,000 OF AIR
CUBIC FEET PER MINUTE.

AIR COMPRESSING, WINDING,

--------------- AND --

GENERAL MINING MACHINERY.

DAVIS’S DEPUTY

OR

FIRE TRYER’S LAMP

(FLAME)

Gives greatly
increased light
over ordinary
Marsaut Lamp
without the
increase of
extra parts or
consumption
of more oil.

Send for Pamphlet 41 L and
Copy of Report of Test by
Dr. HENRY BRIGGS.

JOHN DAVIS & SON

/nttwdklA V TTO ALL SAINTS WORKS, DERBY;
I U GvF KJ W I far < U ■ ■ & 17, Victoria St., Westminster, London, S.W. 1

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