10/13/1903 [Supplied year, month, and day] Edison, Thomas Alva to Simpkin, William [supplied or conjectured]
(Edison Portland Cement Co; Ballantine, James B) Production difficulties and adjustments; Rolls and crushers
[CJ432]  Company Records Series -- Edison Ore Milling Syndicate, Ltd., and Related Companies -- Standard Construction Corporation, Ltd., Files: Correspondence (1903)
[CJ432CAS; TAEM 201:161]
Courtesy of Thomas Edison National Historical Park.
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