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The documents in this file are organized in folders, numbered from 1 through 259. Each folder generally contains several documents pertaining to a particular individual, business interest, business relationship, or transaction. The folder numbers correspond to the numbers on the envelopes in which the items were originally filed. Some folders are missing from the sequence.

The documents for the period 1899-1910 include agreements, correspondence, and other material pertaining to the corporate identity and the finances of the Edison Portland Cement Co. and the Edison-Saunders Compressed Air Co. Also included are items relating to real estate, insurance, and royalty agreements and to the sale and promotion of storage batteries and electric vehicles.

Documents have been selected from twenty envelopes and grouped under four categories: (1) Crushing Roll and Compressed Air Technology (1899-1909); (2) Edison Portland Cement Co. (1899-1910); (3) Real Estate and Insurance (1903-1910); and (4) Storage Batteries and Electric Vehicles (1901-1911). A finding aid for the archival record group is available at the Edison National Historical Park.

Approximately 90 percent of the material in these envelopes has been selected. The items not selected consist primarily of documents that duplicate information in selected material; letters of acknowledgment and transmittal; and documents concerning real estate transactions in which Edison was not a party.