History: Spiral casing for the 70k HP Niagara Falls turbine, being manufactured at the Allis-Chalmers Manufacturing Company, Milwaukee, WI, ca 1922. [600x480]

https://imgur.com/CCx84pR via /r/HistoryPorn https://www.reddit.com/r/HistoryPorn/comments/cmtoeq/spiral_casing_for_the_70k_hp_niagara_falls/?utm_source=ifttt