12/14/1898 Ward, J M [supplied or conjectured] to Edison, Thomas Alva
(Ogden Ore Separating Plant) Production difficulties and adjustments; Ore milling and separation; Briquettes and bricker machinery [Incomplete]
[CJ011]  Company Records Series -- New Jersey and Pennsylvania Concentrating Works -- Administrative and Financial Records: Correspondence (1898)
[CJ011ACU; TAEM 149:937]
Courtesy of Thomas Edison National Historical Park.