ScientificAmerican1916-04-01.jpg Scientific American 1916-03-25ThumbnailsScientific American 1916-04-08Scientific American 1916-03-25ThumbnailsScientific American 1916-04-08Scientific American 1916-03-25ThumbnailsScientific American 1916-04-08Scientific American 1916-03-25ThumbnailsScientific American 1916-04-08Scientific American 1916-03-25ThumbnailsScientific American 1916-04-08

Submarine, on the surface, with man standing in conning tower hailing a sailing ship off a rocky seacoast.