Royalite No. 26 oil well
Royalite No. 26 oil well
Imperial Oil Refinery
Train station, Lethbridge
British American Oil Co. refinery, Coutts
Anaconda Copper Mining Co. smelter and wire mill
Anaconda Copper Mining Co. smelter and wire mill
Anaconda Copper Mining Co. smelter and wire mill
Electrolytic zinc room, Great Falls
American Smelting and Refining Co., Montana