ClipArt ETC
"Pig iron, the crude form of iron, which is produced from iron ore by the process of blasting, is taken to the rolling mills, where it goes through the process of puddling and rolling, and is thus purified and put into proper shape for use." — Beach, 1900

Rolling Mills

"Pig iron, the crude form of iron, which is produced from iron ore by the process of blasting, is taken…