October 1, 1915.

THE COLLIERY GUARDIAN.

697

Ba books

At Tremendous Reductions 1 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 ______

BIRMINGHAM
WOLVERHAMPTON
CARDIFF ______
MANCHESTER___
BIRKENHEAD___
SHEFFIELD ___
NEWCASTLE-ON-

TYNE ______
GLASGOW______
SYDNEY ______

Elverton St., Westminster, S.W.
Tunnel Avenue, East Greenwich,
Saltlev Works.	[S.E.

Lower Walsall Street.
East Moors.

Great Marlborough Street
Bromborough Port.

Celtic Works, Savile Street.

Walker Gate.

Rosehill Works, Polmadie.
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 io—

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, CARBBOARB PROTRACTOR,
reading to F, at 2s. Od„ postage Od,

ILLUSTBATED CATALOGUE ON APPLICATION.

WM MARI I MR Mathematical Drawing and Surveying
■ n» FlMriUlIlWj Instrument Manufacturer,

47, Finsbury Pavement, London, E.C.

Established 1851.	Fa ctobt—HACKNEY, E.

British Insulated & Helsby Cables Ld.,

ELECTRICAL CABLE MAKERS & ENGINEERS.

REGD. TRADE MARK.

Works: Prescot, Helsby, & Liverpool.

8EE LARGE ADVERTISEMENT EVERY FOURTH WEEK.

Elliptic Full-way Cock
A	(M. Allen’s Patent)	qf

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.

CLEAR-FLOW
BORE.”

Write
TO-DAY
for detailed
particulars
and
prices.

__________________________

Semet-Solvay Coke Ovens

^llllllinilllllllllllHIIIIIIIIIIillllllllllllllllllllllllllllHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIrH

SECTION OF OVEN

I III.

IIK

SHOVING 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.