1066

[supplement PAGE IV.]

THE COLLIERY GUARDIAN.

May 24, 1918.

SURVEYING INSTRUMENTS

The

WATSON

The MirrleesWatson Co. Ltd.,
SPECIALISTS IN CONDENSING PLANTS,
Glasgow.

The Mirrlees-Leblanc

Multijector Air Pump.

Weight of Multijector
for 5,000 kw. is 97 lbs.

Davis’s

Cranked

Dial.

Theodolites,
Levels,
Barometers,
etc.

DAVIS’S IMPROVED HEDLEY DIAL WITH CRANKED LIMB,
ENABLING SIGHTS TO BE TAKEN TO ANY DEGREE FROM
LEVEL TO 90 DEGS. UP OR DOWN.

Davis’s Surveying Instruments
are used in the majority of Mines in the
United Kingdom, the Colonies, and other
parts of the World.

PLOTTING INSTRUMENTS

for Railways, Mining Engineering, and Field work.

SEND FOR LIST No. 411 A.

JOHN DAVIS & SON

/Haaiwiswl I 'TO ALL SA,HTS WORKS, DERBY;

| OOF O W J I U ■ ■ & 17. Victoria St., Westminster, London, S.W.

r	Telegrams—“ Davist, Derby.” Telephone—240 Derby

JOHN WOOD & SONS, L™

Engineers, BARLEY BROOK FOUNDRY, WIGAN.

Fitted with

AUTOMATIC BRAKE

and Improved

CLUTCH

Telephone—No. “ 55 ” Wigan

BAND”

Telegrams— ‘ Haulage, Wigan

“ OUTSIDE

1M-H.P. “ENDLESS”

FRICTION

















Haulage Goars of every type.

WINDING, PUMPING & AIR COMPRESSING ENGINES.