986

THE COLLIERY GUARDIAN.

[supplement PAGE II.]

November 8, 1918.

FOR EFFICIENCY AND ECONOMY

For further particulars apply to

LANCASHIRE BOILER FITTED WITH CIRCULATOR.

10%to15%M0RE STEAM
OR
3%to8%SAVINGinFIW^

Bolton House, Cullum Street, Fenchurch Street,

Telephone—AVENUE 872.

LABORATORY-20, CULLUM STREET, EC. 3
Telephone—CENTRAL 11029.

Telegrams—“ LONPLET, FEN, LONDON.”

THE

LONDON SIMPLE! ENGINEERING C? L

•£

NEVER	PASS.

PATENTED

PUMP
BUCKETS

- If -
your water
end of pump
gives you trouble,
Write us for List B.

PUMP BUCKETS

Flexible
~rings

'■/.... , • ■

III:-.-

1



The Rings are Flexible, they Expand
Automatically to Pressure, are Always
Tight, are not Split, do not cause Uneven
Wear, Reducing Friction to a Minimum.

SOLE PROPRIETORS :

Electric Signalling with Bare Wires

DAVIS’S

SPECIAL

BELLS.

TREMULOUS
OR
SINGLE
STROKE.

Patent.

With these
BELLS
there is
NO
POSSIBILITY
of a
SPARK.

Suitable for
A.C. or D.C.

Davis’s Relays with SPECIAL WINDING,
overcoming sparking on the line and in the Relay.

Davis=Fryar Mechano=Electric Signalling.

Patent.

B

EJ----•—

0

The Davis-Fryar System dispenses entirely with bare wires and is in
successful operation throughout the country.

SEND FOR I.1ST 41H.OS.

DICING' Ltd., Stratford, London, E. 15

Telegrams:

“ Dezine, Stratford, Loudon.”

Telephone:

365 Stratford.

JOHN DAVIS & SON (DERBY) LTD.,

ALL SAINTS WORKS, DERBY, & WESTMI NSTe'r. Vw. 1