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Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill
Treatment Of Gold And Silver Ores As Found In The Comstock Lode, Lee R. Grabill
Professional Degree Theses
"Statement of Problem: Metallurgy of Gold, etc.
Required, description of process and machinery used in the extraction of Gold and Silver from earthy and siliceous ores as found in California, the ores being represented by the following- SiO2, 91.44; (Zn,Pb)+Cu2S, 1.38; Al2O3, Fe2O3, etc. 6.39; Au, .0017, Ag2S .12, Variable in 1st, 2nd, and 3rd class ores.
1° - The methods, etc. employed in treating 1st class ores, -such as exceed in value $150 per ton.
2° - Methods, etc. in treating 2nd class ores, such …