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Sketch of mining timbers in use at the Gould and Curry Mine, Virginia, Nev. for particulars see accompanying specifications.
Map shows one or more views for each of six figures demonstrating the construction of the support beams for mine shafts and tunnels. Scale [1:16].
Date:
[1860..1880]
Creator:
unknown
System:
The Portal to Texas History
Map of the Lower Comstock and Emigrant Consolidated Mining Cos. mines
Map shows streets, property ownership, businesses, claims, buildings and tunnels in Silver City and adjacent mining district. Relief shown by hachures. Scale not given.
Date:
[1860..1880]
Creator:
G.T. Brown & Co. Lith.
System:
The Portal to Texas History
Map of the Comstock Lodes extending down Gold Cañon
Map shows buildings, locations of mine shafts, ownership and property lines in American Flat and in Gold Cañon along Main Street. Relief shown by hachures. Scale [1:4,500].
Date:
[1860..1880]
Creator:
G.T. Brown & Co. Lith.
System:
The Portal to Texas History
County map of California.
Map shows mid-nineteenth century California counties, cities and towns, roads, "wagon" road to Salt Lake, and routes marked between major cities which are probably proposed and existing railroads. Insets: "San Francisco Bay and Vicinity" and [Great Salt Lake country]. Relief shown by hachures. Scale [ca. 1:3,900,000] and [ca. 1:1,520,000].
Date:
1860
Creator:
Mitchell, S. Augustus, Jr. (Samuel Augustus)
System:
The Portal to Texas History
Cross section of Sutro Tunnel, Plate 3.
Map shows interior of Sutro Tunnel in Nevada with profiles of the air pipe, car, rails, and drains. Preliminary items are shown in blue. Scale [1:30].
Date:
[1860..1878]
Creator:
unknown
System:
The Portal to Texas History