Browse All
1887 Geological Map of the New Almaden Mining … Geologic Atlas Geological Map of the New Almaden Mining … |
1887 Ore-Bodies and Topography of Mine-Hill, … Geologic Atlas Ore-Bodies and Topography of Mine-Hill, … |
1887 Plan of the New Almaden Mine. Geologic Atlas Plan of the New Almaden Mine. U.S. Geolo … |
1887 Longitudinal Section of the South Ore Ch … Geologic Atlas Longitudinal Section of the South Ore Ch … |
1887 North and South Sections vicinity of the … Geologic Atlas North and South Section , 550 Feet West … |
1887 East and West Vertical Section, New Alma … Geologic Atlas East and West Vertical Section, New Alma … |
1887 Plan of the Clay Walls, New Almaden Mine … Geologic Atlas Plan of the Clay Walls, New Almaden Mine … |