ScientificAmerican1894-07-28.jpg Scientific American 1893-02-04ThumbnailsScientific American 1897-09-18Scientific American 1893-02-04ThumbnailsScientific American 1897-09-18Scientific American 1893-02-04ThumbnailsScientific American 1897-09-18Scientific American 1893-02-04ThumbnailsScientific American 1897-09-18Scientific American 1893-02-04ThumbnailsScientific American 1897-09-18
Tunnel recently completed under the east River, at New York City. Longitudinal section. Cast iron lining. Long Island City entrance. Iron lined section, showing Beach shield in operation. Drilling shot holes around an air lock. Blackwell's Island.



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

Restoration by: magscanner