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These records cover the period 1899-1918. They consist of unbound notes, lists, drawings, calculations, correspondence, reports, notebooks, and pocket notebooks. The records relate primarily to the design and operations of the cement works at Stewartsville, New Jersey. Included are documents dealing with work assignments, output, and costs. A few items concern the employment of Edison's crushing technologies by other enterprises. Other material pertaining to plant operations can be found in the EPCCo Corporate Files.
Most of the selected items are in Edison's hand or contain substantive notations by him. Some of the unselected documents are initialed by Edison. Among the unselected items are a report by William Simpkin from 1900 concerning the status of work on the crushing plant; documents pertaining to miscellaneous accounts; and lists relating to blueprints.
The records are arranged in four groups: (1) General; (2) Reports; (3) Notebooks; and (4) Pocket Notebooks. Related material can be found in N-99-00-00 (see "Notebooks by Edison" in the Notebook Series).