2019-12-112022-02-032019-12-112022-02-03https://hdl.handle.net/11124/173751Donor: Colorado Mining Association.Interior of the Treasure Mountain mill showing equipment including a ball mill.Caption reads: "Mill of Treasure Mountain (?) jig, ball mill and clarifier. San Juan CO."6 1/2 x 4 1/2 inchesblack-and-white photographsCopyright retained by Colorado Mining Association.Mineral processing plants -- ColoradoMineral processing -- Machinery and equipmentViews -- InteriorBall mills -- Colorado -- San Juan CountyMills and mill-work -- Colorado -- San Juan CountyMilling machinery -- Colorado -- San Juan CountyStillImage