ScientificAmerican1882-05-13.jpg Scientific American 1882-05-06ThumbnailsScientific American 1882-05-20Scientific American 1882-05-06ThumbnailsScientific American 1882-05-20Scientific American 1882-05-06ThumbnailsScientific American 1882-05-20Scientific American 1882-05-06ThumbnailsScientific American 1882-05-20Scientific American 1882-05-06ThumbnailsScientific American 1882-05-20

Chronograph for engineering purposes. Kinzua Viaduct -- the higheest railway bridge in the world.



Artist: John Toomey

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

Restoration by: magscanner