2019-11-222022-02-032019-11-222022-02-03https://hdl.handle.net/11124/173488Donor: Colorado Mining Association.Zinc cleaners in a mill building.Caption reads: "New section, showing zinc cleaners to left and zinc (?) to the right, new section."7 1/2 x 7 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Mineral processing plants -- ColoradoMineral processing -- Machinery and equipmentViews -- InteriorMills and mill-work -- Colorado -- Lake CountyStillImage