01/10/1893 Mallory, Walter Seeley -- Technical Notes and Drawings
(Batchelor, Charles; Edison, Thomas Alva) Rolls and crushers; Briquettes and bricker machinery; Ore concentrate
[CJ054]  Company Records Series -- New Jersey and Pennsylvania Concentrating Works -- Plant Operations Records -- Bound Volumes: Experiment & Order Book (1893-1895)
[CJ054001A; TAEM 151:640]
Courtesy of Thomas Edison National Historical Park.