ScientificAmerican1893-01-21.jpg Scientific American 1881-04-30ThumbnailsScientific American 1881-04-30ThumbnailsScientific American 1881-04-30ThumbnailsScientific American 1881-04-30ThumbnailsScientific American 1881-04-30Thumbnails
Adjustable undershot water wheel, for varying water level, of the Potsdam Red Sandstone Co.



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

Restoration by: magscanner