06/30/1891 Hart, Henry W to Cutting, Robert Livingston, Jr
(Livor, Henry M; Edison, Thomas Alva) Labor; Production difficulties and adjustments; Ore milling and separation
[CJ003]  Company Records Series -- New Jersey and Pennsylvania Concentrating Works -- Administrative and Financial Records: Correspondence (1891)
[CJ003AEW; TAEM 149:385]
Courtesy of Thomas Edison National Historical Park.