Date
undatedKeywords
Underground mining -- ColoradoLaboratory equipment
Views -- Interior
Lead mines and mining -- Colorado -- Ouray County
Silver mines and mining -- Colorado -- Ouray County
Assaying -- Colorado -- Ouray County
Furnaces
Metadata
Show full item recordAbstract
A man wearing protective gloves operates a furnace at the Idardo assay office.Caption reads: "Idarado Assay Office."