Box OS
Container
Contains 27 Results:
Stope map showing ore removed, ore developed, and probable ore in the Hecla Mine, 1921
File — Box: OS, Folder: 104
Identifier: 1808
Dates:
1921
Blueprint of mine workings, Morning Mine, south vein above No. 6, 1910
File — Box: OS, Folder: 105
Identifier: 1811
Dates:
1910
Assay map showing results of check sampling by J.W. Gwinn of a part of the Star Tunnel, 1920
File — Box: OS, Folder: 107
Identifier: Series V
Dates:
1920
Sunset District Showing underground workings and geology, with assay values, 1927
File — Box: OS, Folder: 108
Identifier: Series V
Dates:
1927
Longitudinal cross section (2), Composite map of workings (2), Assay map (1)
File — Box: OS
Identifier: Series V
Dates:
1910-1936