12/24/1881 Eaton, Sherburne Blake to Conley, M R
Production difficulties and adjustments; Metals and minerals; Ore milling and separation
[LM005]  Letterbook Series -- Miscellaneous Letterbooks: (LM-005) Ore Milling Co Letterbook (1881-1887)
[LM005088; TAEM 84:258]
Courtesy of Thomas Edison National Historical Park.