May 2, 1913.

THE COLLIERY GUARDIAN.

895

Economic Steam-Raising in Steam Collieries.

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“ Bennis ” Machine Stokers are essential to Cheap Steam
Raising in Collieries.





There is no colliery that to-day can afford to hand-fire its
boilers, or to instal inefficient machine-stokers !

A great deal is essential to EFFICIENCY in a mechanical
stoker. It must he of adequate design for the work it has to do.
It is a poor consolation that it is a ‘ good ’ stoker if its ‘ goodness ’
is not adequate to its particular work. A round peg may be a
‘ good ’ peg but it is useless in a ‘ square ’ hole.

The stoker that is guaranteed to do its work efficiently in steam
collieries is the “ Bennis ” Stoker and Self-cleaning Compressed Air
Furnace. There is no blocking of the air-spaces with clinker or
ash in the “ Bennis ” machine. It keeps its own bars clean and
ensures strong, clear fires, consuming its own smoke before it can
reach the chimney.

The “ Bennis ” machine is doing first-rate work in the leading
steam collieries in South Wales, Yorkshire and elsewhere, and
rapidly pays for itself and yields steady dividends.

Write for “ When Ufachine-stoking Pays in Collieries ” pamphlets to Ed. Bennis & Co. Ltd.,
Little Halton, Bolton; or 28, Victoria Street, London, S.W.

WILL BEAR THE

MOST SEARCHING TESTS !

ABSOLUTELY

SAFEST

Telephone
Numbers :

ELECTRIC DETONATOR FUSES with “Tetryl” Detonators,
Shot Firing Batteries, Cables, and all accessories.

no Nitro-Glycerine Safe to Handle. Cannot Freeze
ALL ON PERMITTED LIST.

( “Roburite, London,”
i “ Roburitb, Gathurst.'

Address orders to—

The ROBURITE EXPLOSIVES CO. LTD.. GATHURST, nr. WIGAN.

London Office:—103, CANNON STREET, LONDON, E.C.

C London—Bank 141.

i Gathurst—Upholland 9.

Telegrams—“BELLISS, BIRMINGHAM."

Telephones—CENTRAL, 4480/1.

Established 1852.

London Office—

S, Victor in Street, S.JV.

As proved

by 23 years’ practical
use in the most Fiery and
Dusty Mines in the Country

AMVIS, NEGRO POWDER
and DREADNOUGHT POWDER.

BELLISS & MORCOM LIMITED, Engineers, BIRMINGHAM,

STEAM DRIVEN AIR COMPRESSOR.

“BELLISS” SELF-LUBRICATING

AIR COMPRESSORS



One, two, three, or four stages.

STEAM, MOTOR, BELT OR
ROPE DRIVEN.

From 250 to 15,000 c f. per min., for

Collieries, Mines,
Workshops, Rock

Drills, Air Lifts.

ENGLAND.

MOTOR DRIVEN AIR COMPRESSOR.



FOR HANDLING OF SLIMES AND OTHER

PURPOSES.