ScientificAmerican1891-03-14.jpg Scientific American 1891-02-28ThumbnailsScientific American 1893-06-17Scientific American 1891-02-28ThumbnailsScientific American 1893-06-17Scientific American 1891-02-28ThumbnailsScientific American 1893-06-17Scientific American 1891-02-28ThumbnailsScientific American 1893-06-17Scientific American 1891-02-28ThumbnailsScientific American 1893-06-17
Manufacture of heavy ordnance at the Washington Navy Yard. Heavy guns for ships.



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

Restoration by: magscanner