ScientificAmerican1877-07-07.jpg Scientific American 1875-12-25ThumbnailsScientific American 1877-07-14Scientific American 1875-12-25ThumbnailsScientific American 1877-07-14Scientific American 1875-12-25ThumbnailsScientific American 1877-07-14Scientific American 1875-12-25ThumbnailsScientific American 1877-07-14Scientific American 1875-12-25ThumbnailsScientific American 1877-07-14

Hunt's system of screw propellers, shown on a steam riverboat.



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

Restoration by: magscanner