ScientificAmerican1891-03-21.jpg ThumbnailsScientific American 1894-07-07ThumbnailsScientific American 1894-07-07ThumbnailsScientific American 1894-07-07ThumbnailsScientific American 1894-07-07ThumbnailsScientific American 1894-07-07
The new steel flating derrick at the Brooklyn Navy Yard.



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

Restoration by: magscanner