ScientificAmerican1903-03-28.jpg Scientific American 1897-09-04ThumbnailsScientific American 1897-09-04ThumbnailsScientific American 1897-09-04ThumbnailsScientific American 1897-09-04ThumbnailsScientific American 1897-09-04Thumbnails
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