February 16, 1917.

THE COLLIERY GUARDIAN.

321

	1  ?	? (AS  I Z  1 Hv	r-r A		' (r. . r	
				

Its all in the rigid Rib.





No more unsightly buildings

The nature of the ground in colliery districts necessitates a light

weight type of
account of ground trouble many unsightly structures of timber and corrugated iron have
There is no longer any need for this. A building erected with Hy-Rib and structural
gives the desired lightness, but is far more attractive in appearance.

Hy-Rib is a Ribbed Steel Lath which needs supports at I Oft. 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 Co.’s Pit Head Buildings,
erected on this principle.

Send for Handbook and learn of its utility.

THE TRUSSED CONCRETE STEEL C°- LTD-

64, CAXTON HOUSE, WESTMINSTER, S.W.

building. On
been erected,
steel not only

Walter Scott Ltd.

Leeds,	LEEDS STEEL WORKS,	England

MANUFACTURERS OF

BRITISH STANDARD ROLLED STEEL JOISTS, CHANNELS,
TRAMRAILS AND PERMANENT WAY RAILS, &c-

Pit Head Frame.

u Erected in Works
for inspection-

i

Example ot 10 in. x 6 in.

-_42 lb. R.S. Joists curved for Framework to Roadway,

ROLLED STEEL JOISTS for PIT PROPS,
FRAMEWORK TO ROADWAYS. &c.

STRUCTURAL STEELWORK FOR BUILDINGS, Ac.

Mild Steel Blooms. Billets, Slabs, Tinbars, Rounds & Fiats.

Rolls cm for Special Sections and to approved quantities
Books of Sections and other information on application.

CEMENTATION and
CHEMICAL TREATMENT

YEARS of STUDY
and EXPERIENCE
HAVE RROUGHT
MY SYSTEM OF
CEMENTATION
TO PERFECTION.

TO COLLIERY PROPRIETORS.

Shafts sunk, tunnels driven, and
other mining constructions carried
out in difficult and very wet ground
by the best method. Success guar-
anteed.

18 shafts completed in England,
and 7 in progress.

Ferro-Concrete Lining a speciality.

Feeders of water in shafts or levels
effectually treated.

ALBERT FRANCOIS,

Telegrams—“Francois, Doncaster,”	Telephone—4 08 Doncaster.

ADIEEI1I 1111 I C For Producing
unlrrin WIILLo stonedust.

No. 6 REPORT OF THE EXPLOSIONS IN MINES COMMITTEE,
whilst recommending a minimum of 50 °/0 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 & 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 C?

37, Wa lb rook, LONDON, E.O.