ScientificAmerican1891-05-16.jpg Scientific American 1891-05-09ThumbnailsScientific American 1891-05-30Scientific American 1891-05-09ThumbnailsScientific American 1891-05-30Scientific American 1891-05-09ThumbnailsScientific American 1891-05-30Scientific American 1891-05-09ThumbnailsScientific American 1891-05-30Scientific American 1891-05-09ThumbnailsScientific American 1891-05-30

The Broadway and Seventh Avenue (New York City) Railroad -- clearing obstructions from the lines of the conduits.



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

Restoration by: magscanner