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These records cover the period 1899-1912 and consist of five general ledger books summarizing transactions relating to the cement works at Stewartsville, New Jersey; company offices in Philadelphia and in Camden, New Jersey; and the model of Edison's concrete house at the West Orange laboratory.
Among the items not selected are seven general ledgers (1913-1929); eleven journals (1899-1925); fourteen cash books (1899- 1919); eleven cash receipt books (1919-1931); and four cash disbursement books (1920- 1931).