ScientificAmerican1875-04-24.jpg Scientific American 1875-04-17ThumbnailsScientific American 1875-05-01Scientific American 1875-04-17ThumbnailsScientific American 1875-05-01Scientific American 1875-04-17ThumbnailsScientific American 1875-05-01Scientific American 1875-04-17ThumbnailsScientific American 1875-05-01Scientific American 1875-04-17ThumbnailsScientific American 1875-05-01

Pierce's improved method of constructing bridges with long spans. Illustrated with steam train running across S-curve structure bridge built over river.