June 29, 1917.

THE COLLIERY GUARDIAN.



J
b
ft



M?.

© 4

_______	• ,r -Ww<

T	A'_.



Economical Production

is now more than at any previous time in the history of Coal mining the principal
object of every coal owner and mine manager.

INGERSOLL-RAND

RADIAL COAL CUTTER

This Compressed Air operated Coal Cutting Machine has, as a result of exhaustive
tests under the most arduous conditions, proved itself to be the most economical and
successful coal getter now on the market.

The principal factors tending to this result, and which have been developed as a result
of long experience in the design and construction of this class of machinery, are
LIGHT WEIGHT, EASE OF HANDLING, FAST CUTTING, ECONOMICAL USE
OF POWER, DURABILITY.

Catalogue 5006 gives some interesting information about the “ R 47.”

INGERSOLL-RAND

COMPANY,

Z'~^x 165,QUEEN VICTORIA STREET,

IN C. IN U.S.A