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Scientific American 1921-02-26
1029/1099
Drilling rock by means of energy transmitted through a liquid column. Building construction, foundations, excavation.
Artist: J. M. Mitchell
Source: Steve Kirch, collector, and creator of this website about SCIENTIFIC AMERICAN in the past
Restoration by: magscanner
- Created on
- Monday 6 April 2009
- Posted on
- Monday 6 April 2009
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