ScientificAmerican1904-06-11.jpg Scientific American 1904-06-04ThumbnailsScientific American 1904-06-18Scientific American 1904-06-04ThumbnailsScientific American 1904-06-18Scientific American 1904-06-04ThumbnailsScientific American 1904-06-18Scientific American 1904-06-04ThumbnailsScientific American 1904-06-18Scientific American 1904-06-04ThumbnailsScientific American 1904-06-18

Completing the New York City rapid transit subway. The arched bridge and station at 125th Street. One of the skewbacks of the main arch.



Source: Steve Kirch, creator of a wonderful website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner