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Scientific American 1921-02-26

ScientificAmerican1921-02-26.jpg Scientific American 1877-12-22ThumbnailsScientific American 1919-05-31Scientific American 1877-12-22ThumbnailsScientific American 1919-05-31Scientific American 1877-12-22ThumbnailsScientific American 1919-05-31Scientific American 1877-12-22ThumbnailsScientific American 1919-05-31

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