March 15, 1918.

THE COLLIERY GUARDIAN.

549

Speed and Durability.

“MECO
HAMMER
DRILLS.

Manufactured in Three Sizes.

2b.—Weight 281b., for drilling
coal and medium stone.

4b.—Weight 33 lb., for any
ordinary rock drilling.

6b.—Weight 35 lb., for sinking
and deep hole drilling.

THE lightning reversal of the flap valve, which is undoubtedly the most flexible
valve extant, enables “ Meco ” machines to strike an enormous number of
powerful blows per minute. Result: Great Drilling Speed.

“MECO” HAMMER DRILLS are constructed throughout of the finest quality,
carefully selected forged steel, all the wearing parts being machined on the most
up-to-date machinery, hardened by the latest scientific methods and ground to
gauge to a hairsbreadth. Each part is inspected after each operation, and only
first-class workmanship and material is passed. Finally the machine, after assembly,
must pass a very severe test before despatch. Result: Great Durability.

The above two points enable us to guarantee our machines against defective
workmanship and material for six months.

Prompt Delivery if you order at once.

ThE Mining Engineering Co. Ld.

Meco Works, Moorfields,

Telegrams—“ Meco, Sheffield.”
Telephone—4530 Central (2 lines).

SHEFFIELD.