ScientificAmerican1904-01-16.jpg Scientific American 1901-11-16ThumbnailsScientific American 1901-11-16ThumbnailsScientific American 1901-11-16ThumbnailsScientific American 1901-11-16ThumbnailsScientific American 1901-11-16Thumbnails
Sectional view of Pennsylvania Railroad tunnel now under construction underneath the East River (New York City). New Jersey to Long Island, six miles.



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

Restoration by: magscanner