Forge at Saugus Iron Works, in Massachusetts, as well as the rolling and slitting mill. Image courtesy Alex Demas/USGS, 2014. (Photo by Smith Collection/Gado/Getty Images).
Forge at Saugus Iron Works, in Massachusetts, as well as the rolling and slitting mill. Image courtesy Alex Demas/USGS, 2014. (Photo by Smith Collection/Gado/Getty Images).