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Scientific American 1892-01-23

ScientificAmerican1892-01-23.jpg Scientific American 1891-10-17ThumbnailsScientific American 1893-04-22Scientific American 1891-10-17ThumbnailsScientific American 1893-04-22Scientific American 1891-10-17ThumbnailsScientific American 1893-04-22Scientific American 1891-10-17ThumbnailsScientific American 1893-04-22Scientific American 1891-10-17ThumbnailsScientific American 1893-04-22

A proposed method of tunneling under the Hudson River. Construction of tube sections which are floated, sunk, and connected. Same method used for BART subway tunnel, San Francisco Bay Area.



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

Restoration by: magscanner