ScientificAmerican1911-06-10.jpg Scientific American 1899-02-18ThumbnailsScientific American 1899-02-18ThumbnailsScientific American 1899-02-18ThumbnailsScientific American 1899-02-18ThumbnailsScientific American 1899-02-18Thumbnails
Col. George Washington Goethals, Canal Builder.



Source: Steve Kirch, creator of a wonderful website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner