ScientificAmerican1884-06-28.jpg Scientific American 1884-06-21ThumbnailsScientific American 1887-07-02Scientific American 1884-06-21ThumbnailsScientific American 1887-07-02Scientific American 1884-06-21ThumbnailsScientific American 1887-07-02Scientific American 1884-06-21ThumbnailsScientific American 1887-07-02Scientific American 1884-06-21ThumbnailsScientific American 1887-07-02

Discharger and excavators now in use on the Panama Canal. French excavator; American excavator