September 1, 1916.

THE COLLIERY GUARDIAN-

393

— Jr/-'"

the rigid Rib.

Pit Head Building:

THE TRUSSED CONCRETE

64, CAXTON HOUSE, WESTMINSTER, S.W.

more unsightly buildings

more attractive in appearance

weight type of building. On
iron have been erected.

The nature of the ground in colliery districts necessitates
account of ground trouble many unsightly structures of timber and corrugated
There is no longer any need for this. A building erected with Hy-Rib and structural steel not on)
gives

is no longer any n
the desired lightness,

Hy-Rib is a Ribbed Steel Lath which needs supports at 10ft. centres only, and
readily takes 2 in. of cement plaster. Its use ensures the most rapid permanent con-
struction possible, the building costs little or nothing for maintenance and is superior in
every way to the usual type of building.

Illustration shows the Sharlston Colliery
erected on this principle.

Send for Handbook and learn

of its utility.

STEEL C°- L™

If



■ 1

Water Tube Boiler, “ Woodeson ” Patents,
fitted with Patent Superheater and Stoker
of the Underfeed Type.

CLARKE, CHAPMAN & CO. LTD

Victoria "Works,

GATESHEAD.

GENERAL AND ELECTRICAL ENGINEERS

— AND —

BOILERMAKERS.

Specialists in Colliery Power Plant, Haulage and
Winding Gears, Water Tube Boilers (“Woodeson”
Patents), Pumps for all purposes (steam and
electrically driven).

9

Sectional view of Boiler showing Superheater
in position.





Telephones—	Telegrams—

1070-1073 Central, Newcastle. 137, City.	Cyclops, Gateshead. Cyclops 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.

GRIFFIN MILLS

For Producing
STONEDUST.

No. 6 REPORT OF THE EXPLOSIONS IN MINES COMMITTEE,
whilst recommending a minimum of 50 °/o passing a 200 x 200 sieve, says
emphatically“ THE FINER THE DUST THE BETTER," con-
sequently, STONEDUST PRODUCED BY THE GRIFFIN MILL

SYSTEM IS THE MOST EFFICACIOUS PRODUCTION FOR

THE PURPOSE, SEEING IT PREPARES:—

Percentage Horse
Output per hour	Passing	Power

200 x 200 Sieve Required

Dust from South Wales Shale—	1	to	tons upwards	83 °/o	25

Dust from Yorkshire and other Shale— 1 to tons upwards	87 °/o	25

No other System of Pulverizing can approach the

GRIFFIN & GIANT GRIFFIN MILL

for Low Cost of Grinding and Fineness of Product.
----- FOR FULL PARTICULARS, APPLY -

BRADLEY PULVERIZER Co.,

37, Walbrook, LONDON, E.C.