October 29, 1915.

THE COLLIERY GUARDIAN.

901

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Mining BOOKS

At Tremendous Reductions ! New Books at 25 per cent.
Discount! Books on Mining, Technical and all other Sub-
jects. Sent on Approval. State Wants. Send for Lists.
Books Purchased. W. & G. FOYLE, 121423, Charing
Cross Road, London, W.C.

OXYGEN.

The BRITISH OXYGEN Co. Ld.

The oldest and most extensive Oxygen producing
and distributing business in the World.

Factories in all industrial Centres equipped
with modern plants producing Oxygen of
unrivalled quality for use with RESCUE
APPARATUS.

ADDRESSES OF THE COMPANY’S WORKS :

LONDON _______ Elverton St., Westminster, S.W.

,,	_______ Tunnel Avenue, East Greenwich ,

BIRMINGHAM ... Saltley Works.	[S.E.

WOLVERHAMPTON Lower Walsall Street.
CARDIFF _______ East Moors.
MANCHESTER___ Great Marlborough Street
BIRKENHEAD____ Bromborough Port.
SHEFFIELD ____ Celtic Works, Savile Street.
NEWCASTLE-ON-

TYNE _______ Walker Gate.

GLASGOW_______ Rosehill Works, Polmadie.
SYDNEY _______ N.S.W.

rWOODITE?

The best material for
Conical GAUGE GLASS RINGS
in all sizes and sections

For Valves, Joint Rings, Pump

Cups, Ram Rings. Packing Rings,

Price List and full particulars on application to—

WOODITE CO., Mitcham Common, Surrey.

SPECIALTIES.

Rocker Bar Furnaces

For maximum efficiency with natural draught.

Twin-Door Furnace Fronts

For large Boilers, side firing, smoke-burning.

Sectional Back Bridges

New economic composite type ; fusion-proof

Tub-Controllers

For all sizes of. tubs or tipping trucks.

Wire Rope Cappels

The new safety quick hosing system. /. ■

Visual Signal Indicators

‘ For all winding conditions.

J. & J. NEIL & CO., Engineers,
93, Hope Street, GLASGOW.



__________	_______________________

__________________________________________

British Manufacture Best Quality at Lowest Prices
Every description either separate or in cases.

SPECIAL 12 in. CARDBOARD PROTRACTOR,
reading to i°, at 2«. 6d., postage Gd.

ILLUSTRATED CATALOGUE ON APPLICATION.

WU MARI |NR Mathematical Drawing and Surveying

■ n. nMni.ll11Uj	Instrument Manufacturer,

47, Finsbury Pavement, London, E.C.

Established 1851.	Factory—HACKNEY, E.

British Insulated & Helsby Cables Ld.,

ELECTRICAL CABLE MAKERS & ENGINEERS.

REGD. TRADE MARK.

Works: Prescot, Helsby, & Liverpool.

SEE LARGE ADVERTISEMENT EVERY FOURTH WEEK.



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u

“ CLEAR-FLOW

Elliptic Full-way Cock

costs no more than an elongated-
way cock, and is equal in service
to a round-way full-bore cock.

W. H. WILLCOX & CO. LTD., 32 to 38, Southwark Street, London.

Write
TO-DAY
for detailed
particulars
and
prices.



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Semet-Solvay Coke Ovens

SECTION OF OVEN

SHOWING SOLID CONSTRUCTION.

Strongest in Design.

Separate sets of flues to each oven.

Very low Maintenance Cost.

_______________________________________

“DIRECT” AMMONIA RECOVERY PLANT,
giving increased yield of Sulphate, with less
Labour, and a saving in Steam consumption.

THE COKE OVEN CONSTRUCTION CO. L!

Howard Chambers, 155, Norfolk Street, SHEFFIELD.