04/22/1901 Mallory, Walter Seeley to Orford Copper Co
(Merck & Co) Purchases; Chemicals, chemical products, and chemical processes
[LM242]  Company Records Series -- New Jersey and Pennsylvania Concentrating Works -- Letterbooks -- Walter S. Mallory Letterbooks: LM-242 (Jan-July 1901)
[LM242527; TAEM 154:129]
Courtesy of Thomas Edison National Historical Park.