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The documents in this file cover the years 1875-1929, but the major portion dates from the twentieth century. The documents are filed in envelopes, numbered 1-259. Some envelopes are missing from the numerical sequence. Each envelope generally contains several documents pertaining to a particular individual, business interest, business relationship, or transaction.
Included are deeds, releases, correspondence, and other material relating to the purchase and sale of property belonging to Edison, Mina Edison, and Mary Stilwell Edison in Menlo Park; patent assignments from Thomas J. Handford and William K. L. Dickson to Edison; correspondence associated with the elimination of expired patents; and agreements and correspondence concerning dynamo improvements made by Justus B. Entz of Schenectady. In addition, there are agreements and correspondence regarding the New Jersey and Pennsylvania Concentrating Works and the Spurr Iron Mining Co. in Michigan; and letters pertaining to the financial affairs of Osgood S. Wiley, one of Edison's ore-milling agents in Britain.
Seven envelopes covering the period 1879-1898 (along with some related items from the twentieth century) have been selected. All of the material in these envelopes has been selected except for nine items that appear in Thomas A. Edison Papers, Part I (1850-1878) and a few duplicates. Courtesy of Thomas Edison National Historical Park.