November 13, 1914.

THE COLLIERY GUARDIAN.

1043

THE ISM FOUNDRY COMPANY LTD.,

RAILWAY PLANT & GENERAL ENGINEERS,
Switches, Crossings, Turntables, Water Cranes, Girders, Bridges,
Roofs, Pipes, Pnmps, Wagons, Tanks, Engines, Boilers, Cranes,
Works: NEWPORT, MON.

London Office : 16 & 17 Devonshire Sq. Bishopsgate St., E.C.

Mining BOOKS

At Tremendous Reductions I New Books at 25 per cent.
Discount! Book* on Mining, Technical and all other bub-
jects. Sent on Approval. State Wants. Send for Lists.
Books Purchased. W. & G. FOYLE, 121-123, Charing
Cross Road, London, W.C.

PIT PROPS & Economical Fencing,

(SEASONED WOOD).

the Rent county fencing co.,

Crouch, Borough Green, Kent.

Please state requirements and ask for prices.

GEORGE BURNSIDE,

Burnside’s Safety
Boring Apparatus.

Used must successfully
in tapping old Mine
Workings.

Apply /or Catalogue.

Boring loot Works, Shiney Row, Fencehouses,

Also Eye Guards for Pit Ponies. CO. DURHAM.

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

SPECIAL 12 in. CARDBOARD PROTRACTOR,
reading to i°, at 2a. 6<L. postage 6d.

ILLUSTRATED CATALOGUE ON APPLICATION.

WU UADI IN(2 Mathematical Drawing and Surveying
■ IT. ITMiikllvWj 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.

8EE LARGE ADVERTISEMENT EVERY FOURTH WEEK.

YEADONS’ Latest PATENTED

BRIQUETTE MACHINERY,

For Coal, Coke, Lignite, Iron and other Ores.

YEADON, SON & CO-, Engineers, LEEDS,

Have a World-wide Reputation,	They have supplied MORE BRIQUETTE PLANTS

and 38 Years’ Experience.	than any other firm in this country.

‘ Clear Flow ’ Bore iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiini y±-

NO FRICTION

NO OBSTRUCTION.

Willcox’s

Elliptic Full-way Cock
possesses all the advantages of a round-way full-bore cock without the added cost. By its special construction the bore
gradually tapers from a circular inlet to an elliptical bore in the centre, and thence to circular outlet ; consequently
there is no more friction at the valve than in straight run of pipe. IT RETAINS AN EQUAL AREA RIGHT THROUGH.

Diagram of passage in old
style elongated-way cock
with objectionable obstruc-
tions. ' Note the uneven
flow lines and back eddies,
with consequent restricted
flow, creating friction.

Diagram illustrating
unobstructed passage
in the “Elliptic” Cock.
Note the even flow
lines—no back eddies,
therefore elimination
of frictional resistance.

Write
TO-DAY
for detailed
particulars
and
prices.

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



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.