July 16, 1915.

THE COLLIERY GUARDIAN.

147

MERRYWEATHERS

PATENT
“HATFIELD” PUMP

We make a speciality of HEYWOOD & BRIDGE’S
PATENT FRICTION CLUTCHES and
HAULING INSTALLATIONS.

(Electrical and Mechanical, Vertical and Horizontal.)

for Fire Protection, Boiler
Feeding, Draining, &c., &c.

Can be driven by any motive power



An efficient high-pressure pump at low cost.

An Engineer writes:—“ I am pleased to inform you that the ‘ Hatfield ’
'Pump is working splendidly. I have never had the least trouble with
ut in any way since it was fixed.”

Write for Pamphlet 193P.

MERRYWEATHER & SONS, 63L’0NL°SS, #$E-

^7^7tNCiN««s-cAsnE
DAVIO bripCEA-g -t T

)i«lll

I



ORME ROD’S

IM PROVED

PATENT SAFETY

LINKS

For the effectual prevention
of Accidents from Over-
winding.

THE BEST AND MOST RELIABLE
SAFETY DETACHINC HOOK
YET INVENTED.

Advantages and full particulars
on application.

Sizes up to 10 Tons working
' load in Stock or Progress.

DIPLOMAS OF HONOUR AWARDED
TORONTO, LONDON & OTTAWA,
CANADA, August, September and
October, 1898.

Send for Catalogue--Free.

Patentees & Sole Makers, DAVID BRIDGE & CO. LD., Haulage Works,
CASTLETON, MANCHESTER.

PATENTEE SOLE MANUFACTURER—

EDWARD ORMEROD,

Atherton, nr. Manchester.

THE SOUTH WALES COALFIELD. PART II.

By Henry K. Jordan, F G.S. (Past President and first-

Gold Medallist of the South Wales Institute of Engineers).

This Paper, which deals with the western part of the Coalfield, has just
been published by the South Wales Institute of Engineers. It consists of
81 pages of printed matter with sections and diagrams. The large drawings
are issued separately and comprise

1.	a. Horizontal Section across the anthracite region of Llandybie and

Pant-y ffynnon, and via the Dulais Valley to tne sea at Swansea. It
is drawn to a scale of six inches to one mile, is 8 ft. in length, mounted
on linen, and geologically coloured.

2.	Comparative Sections of the LowtR Measures in the following areas

(A)	Neath Valley.	(Ej Ammanford

(B)	Swansea Valley.	(F) Loughor Valley.

(C)	Brynamman District.	(G) Gwendraeth District.

(D)	Amman Valley.	(H) Gwendraeth District.

These are drawn on one sheet, about 35 by 30 in., mounted on linen, to
a scale of 200 ft. to 1 in.

3.	A Map of Swansea District, on a scale of 6 in. to one mile, showing

the outcrops of the coal seams.

A limited number of the above are for sale, and may be obtained from

The Secretary, The South Wales Institute of Engineers,

CARDIFF.

Price £1 Is., Postage Extra.

*’ The South Wales Coalfield,” Part I., by Mr. H. K. Jordan, published
in 1908, price £2 2s , dealt with the eastern half of the Coalfield, and may be
obtained from the Secretary.

B EVER’S PATENT ATTACHMENT

® TO PREVENT

OVERWINDING,

EXCESSIVE SPEED,

OR STARTING IN WRONG DIRECTION.

ABSOLUTE AUTOMATIC CONTROL

DURING FULL PERIOD OF WIND.

CAN BE FITTED TO ANY ENGINE.

BEVER, DORLINGi. CO. L»

Makers of all kinds of COLLIERY PLANT.

Telegrams—“Foundry, Bradford.” Bowling Ironworks, BRADFORD. Telephone—1644 Bradford

AGEIN-X-S-

Northumberland & Durham—Mr. W. E. COWENS, Scottish Union Bldgs., 90, Pilgrim St., NEWCASTLE-ON-TYNE.
South Yorkshire, Derbyshire & Nottinghamshire —

Mr. E. L. ROUSSETT, Calow Close, Old Brampton, nr. CHESTERFIELD
South Wales-Mr. D. LLEWELLIN EVANS, 120, Bute Street, CARDIFF.

Price 3s. 6d. Post Free.

ELECTRIC CIRCUIT PROBLEMS A Practical Handbook for Colliery Electricians.

IN MINES AND FACTORIES.

By ELLIS H. CRAPPER, B.Eng.,	Head of the Department of Electrical Engineering at the University of Sheffield.

THE COLLIERY GUARDIAN CO. LTD., 30 & 31, Furnival Street, Holborn, London, E.C.

ANTHRACITE COAL

PLANT

We have Specialised in this
class of Machinery, and have
designed and made more than
all other firms

References to users

Established 50

combined.

are invited.
Years.

BRIOuENS.

SOUTH WALES/