Documents from the G. M. Colvocoresses mining collection. Description: Correspondence, notes by Colvocoresses, notes with assays, report by International Geophysics Inc., map of workings third and fourth levels of Lake Short Mines at scale 1 = 40', map including assays, assay record, estimated working costs of 50 ton per day of oxidised ore copper segregation plant at the Alaska Mine in Southern Rhodesia, Leaching of Caved Areas Ohio Copper Mine by Bureau of Mines,. Property Name: Lakeshore Mine. Property AKA: Arizona Ms 3051, Pat.; Copper Bell Ms 3051, Pat.; Lakeshore Slate Groups; Transarizona; Trout And Atchinson Property; Drake Group; Atlas Dev. Co. Property; Isabell Claim; Treasure State Group; Casa Grande Cyprus; Tohono; Cyprus [...]
