The new air compressors which furnish power to drive the drills, about 500 feet below the surface of the earth.
Summary
Picryl description: Public domain image related to an industrial revolution, mill, factory, free to use, no copyright restrictions image.
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Tags
massachusetts
hoosac tunnel mass
tunnels
air compressors
hurd ward publisher
stereoscopic views
air
compressors
power
drive
drills
surface
earth
united states
robert dennis collection of stereoscopic views
ultra high resolution
high resolution
industrial history
new york public library
Date
1850 - 1930
Source
New York Public Library
Link
Copyright info
Creative Commons CC0 1.0 Universal Public Domain Dedication ("CCO 1.0 Dedication")