Front:
Preparing for a Blast, Panama Canal.
Back:
FAMOUS
SUPERIOR QUALITY
THROUGHOUT
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 Valentine-Souvenir Co., New York. Printed in U. S. A.PC35
THE WORLD
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