02/12/1906 Yellow Jewel Mines Co and Armitage, B M to Edison, Thomas Alva
(Southern Pacific Railroad Co) Metals and minerals; Ore exploration and mining [Marginalia by Edison, Thomas Alva]
[D0623]  Document File Series -- 1906: (D-06-23) Mining -- Cobalt Search -- Samples
[D0623AAB; TAEM 190:723]
Courtesy of Thomas Edison National Historical Park.
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