Ewing, Charles RobertsSmith, Claude H.2016-04-262022-02-032016-04-262022-02-031900https://hdl.handle.net/11124/170060Senior thesis.engCopyright of the original work is retained by the author.Mines and mineral resources -- Colorado -- Rio Grande CountyVeins (Geology) -- Colorado -- Rio Grande CountyAssaying -- Colorado -- Rio Grande CountyOre-dressingReport on the Little Annie group of minesText