1010

THE COLLIERY GUARDIAN.

November 13, 1914.



| THREE SPECIALITIES

H of the World Famous Engineering Specialists.

1 S.E.^4. Rings

= Pump and

EE	Engine Packing

EE	(patented).

|e	and S.E.A. Ring

=	Pistons.

Are a scientifically designed packing
of British Manufacture through-
out.

Their quality and efficiency long
known to users everywhere, have
recently received the official recog-
nition of the French Government.
A copy of this report will be gladly
sent on application. Further Speci-
alities S.E.A. Ring Valves and Com-
pressed Asbestos Jointing.

|	♦ The

|	“Ruby gage”

= T Indicator

= (patent applied for).

This is a practical device for
colouring the water in a gauge-
glass red, thus enabling the water-
gauge level to be readily seen from
any angle at any height. The
“ Rubygage ” Indicator can be
attached to any gauge without inter-
fering with the gauge itself.

An Indicator will be sent for 30 days’
Free Trial on application.

=	T^e

| “Thermofeed”

H	System	of

=	Boiler-Feed	Control

=	(patented).

Enables the water level to be main-
tained at its most economical
height, automatically regulating the
check valves as required, and, at the
same time, so controlling the action of
the feed pump that its work is limited
to the exact feed supply necessary.

= If you will write us, we shall be glad to point out to you the benefits
== that accrue from the employment of the “ THERMOFEED ” System.

| RONALD TRIST & CO. LTD.,

=	LONDON : 4, Lloyds Avenue, E.C.

=	Branches at Manchester, Glasgow, and Paris.

[*■
11

K. F





\2

Slower
kSTEADILYj

t—___________

RAISE;

5 ^O^STEADIL^

'RAISE

k 8a

“NON-CUMULATIVE”

WINDING SIGNALS

Complying with the Rules.

SIMPLE. EFFICIENT. INEXPENSIVE.

The Non-cumulative Indicator is designed
to overcome the objections expressed by
colliery managers and winding enginemen
of having an indicator which accumulates
(3 & 1). That now offered lias two plunders.

DAVIS’S Electrical
BELL & INDICATOR.

RAISE

5

RASE

STOP

LOWER

STEADILY

DWER1

OTAOILY;

6

|P\I2 \ 1 / I 7J

&

DAVIS’S

Mechanical

NOW READY. Order at once.

Cloth, 2s. Roan, gilt, 3s. Calf, gilt, 4s. 6d.

COLLIERY MANAGER’S

POCKET BOOK,
Almanac and Diary,
1915
(Being the Forty-Sixth Year of Publication).
Editor: HUBERT GREENWELL, F.S.S., Assoc.M.I.M.E.

Indicator.

----o--
Send for List 41 V.

JOHNDAVIS &

SON (Derby) Ls
j All Saints Works, Derby ;
and 1 7, Victoria Street,
WESTMINSTER, S.W.

Designed especially as a handy work of reference for the use of
Colliery Managers and Officials, each successive issue is thoroughly
revised in accordance with the most recent colliery practice.

For several years the whole of the editions have been exhausted
shortly after publication, and many have been unable to obtain copies.
Orders can be booked now, and will be executed in rotation.

LONDON:

The Coljjery Guardian Company Limited,

30 & 31, Furnival Street, Hol born, E.C.