462

[supplement page tv.]

THE COLLIERY GUARDIAN.

August 30, 1918.

“SIMPLE! CIRCULATOR”

FOR EFFICIENCY AND ECONOMY.

LANCASHIRE BOILER FITTED WITH CIRCULATOR.

10%to15%MORE steam
on

For further particulars apply to:

THE

LONDON SIMPLE! ENGINEERING C° L°

Bolton House, Cullum Street, Fenchurch Street, E.C- 3.

Telephone—AVENUE 872.

LABORATORY—20, CULLUM STREET, EC. 3.

Telephone—CENTRAL 11029.

Telegrams—“ LONPLET, FEN, LONDON.”

PRINCEPS PATENT
“DEFLECTOR” OIL SEPARATOR.

Capacity, 300,000 lbs. of
steam per hour,
60" diameter main.

ONE OF THE LARGEST
EXTRACTORS MADE IN THIS
COUNTRY.

PRINCEPS & CO.,

Engineers,

SHEFFIELD.

RAISE.

.STEADILY,

RAISE
.STOP,

WINDING

SIGNALS

“NON-CUMULATIVE.”

ELECTRIC.
MECHANO-ELECTRIC.
MECHANICAL.

SIMPLE.

EFFICIENT.

INEXPENSIVE.

CEMENTATION FOR
WET VIRGIN GROUND

DAVIS’S SPECIAL

RELEASING GEAR.

YEARS of STUDY
and EXPERIENCE
HAVE BROUGHT
MY SYSTEM OF
CEMENTATION
TO PERFECTION.

TO COLLIERY PROPRIETORS.

Shafts sunk, tunnels driven, and
other mining constructions carried
out in difficult and very wet ground
by the best method. Success guar-
anteed.

19 shafts in Great Britain sunk with
cementation.

Ferro-Concrete Lining a speciality.

Feeders of water in shafts or levels
effectually treated.

ALBERT FRANCOIS, doncastbr.

Telegrams—“Francois, Doncaster,"	Telephone—4 08 Doncaster.

HAULAGE PLANE
SIGNALS
Electric or Mechano-Electric.

SEND FOR LIST 41 v.

JOHN DAVIS & SON (Derby) Ltd.

All Saints Works, DERBY ; & 17, Victoria Street, Westminster, S.W. 1.

Partners : Albert J. Franjois (Belgian); Thomae Blandford.