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Scientific American 1903-03-28

ScientificAmerican1903-03-28.jpg Scientific American 1903-03-21ThumbnailsScientific American 1903-04-04Scientific American 1903-03-21ThumbnailsScientific American 1903-04-04Scientific American 1903-03-21ThumbnailsScientific American 1903-04-04Scientific American 1903-03-21ThumbnailsScientific American 1903-04-04Scientific American 1903-03-21ThumbnailsScientific American 1903-04-04

Electricity in modern mining installations -- an alternating current motor driving a mining pump underground.



Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner