That's the subject of a previous article in this series: https://technicshistory.com/2021/07/13/the-triumvirate-coal-iron-and-steam/ https://technicshistory.com

That's the subject of a previous article in this series: https://technicshistory.com/2021/07/13/the-triumvirate-coal-iron-and-steam/ https://technicshistory.com/2021/07/13/the-triumvirate-coal-... A great read too!