ScientificAmerican1894-12-08.jpg Scientific American 1894-12-01ThumbnailsScientific American 1894-12-15Scientific American 1894-12-01ThumbnailsScientific American 1894-12-15Scientific American 1894-12-01ThumbnailsScientific American 1894-12-15Scientific American 1894-12-01ThumbnailsScientific American 1894-12-15Scientific American 1894-12-01ThumbnailsScientific American 1894-12-15

The steel foundations of tall office buildings. The American Surety Building. The Fahys Building. Details of cantilever. Steel frames; direct bearing columns.



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

Restoration by: magscanner