ScientificAmerican1880-08-14.jpg Scientific American 1880-08-07ThumbnailsScientific American 1880-08-21Scientific American 1880-08-07ThumbnailsScientific American 1880-08-21Scientific American 1880-08-07ThumbnailsScientific American 1880-08-21Scientific American 1880-08-07ThumbnailsScientific American 1880-08-21Scientific American 1880-08-07ThumbnailsScientific American 1880-08-21

Manufacture of steel: Pittsburgh steel works, Anderson & Co., Pittsburgh, Pennsylvania. Rod rolling mill; pouring cast steel ingots; the 15-ton open hearth furnace; rolling the steel; cutting agricultural shapes.



Source: Steve Kirch, creator of a wonderful website about SCIENTIFIC AMERICAN in the past

Restoration by: magscanner