ScientificAmerican1891-05-16.jpg ThumbnailsScientific American 1891-10-17ThumbnailsScientific American 1891-10-17ThumbnailsScientific American 1891-10-17ThumbnailsScientific American 1891-10-17ThumbnailsScientific American 1891-10-17
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