History: Iron ingot production in 1890s Chicago [2880x2238]

https://upload.wikimedia.org/wikipedia/commons/thumb/1/1d/Casting_pig_iron%2C_Iroquois_smelter%2C_Chicago.jpg/2880px-Casting_pig_iron%2C_Iroquois_smelter%2C_Chicago.jpg via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/6t7k52/iron_ingot_production_in_1890s_chicago_2880x2238/?utm_source=ifttt