Front:
Preparing for a Blast
Back:
The Leighton & Valentine Co.,N.Y. City. PC35
THROUGHOUT
FAMOUS
QUALITY
TRADE MARK.
Preparing for a blast. Drilling solid rock
with heavy drills run by compressed air, which
is brought through large pipes from the largest
air-compressing system in the world, made up
of the three stations at Las Cascadas, Empire,
and Rio Grande.
THE WORLD
Address Only
