This folder contains undated notes, lists, and drawings in Edison's hand, along with other documents with notations by him. Most of the material is probably from the period 1903-1909 and relates to operations at the Stewartsville works. Included is an estimate of daily costs for an unidentified briquetting experiment. Also included is an item pertaining to the New Jersey and Pennsylvania Concentrating Works that is probably from 1896-1899.

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