ScientificAmerican1892-01-23.jpg Scientific American 1892-01-16ThumbnailsScientific American 1892-01-30Scientific American 1892-01-16ThumbnailsScientific American 1892-01-30Scientific American 1892-01-16ThumbnailsScientific American 1892-01-30Scientific American 1892-01-16ThumbnailsScientific American 1892-01-30Scientific American 1892-01-16ThumbnailsScientific American 1892-01-30

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