This collection consists primarily of letters exchanged between Edison and Secretary of the Navy Josephus Daniels, along with related correspondence. Many of the typewritten letters are accompanied by drafts in Edison's hand. The documents in this folder are from February-March 1917. They pertain to Edison's efforts to develop a reliable telephone system for use aboard ships. Edison's letter of March 7 discusses several projects in addition to the ship telephone, and extracts from this letter can be found in the folders for Reports 7, 9, 12, and 26.
This project is described on pp. 189-190 of Lloyd N. Scott's Naval Consulting Board of the United States.
[X128C10A], Letter from Thomas Alva Edison to Josephus Daniels, February 26th, 1917 1917-02-26
[X128C10B], Letter from Josephus Daniels to Thomas Alva Edison, February 28th, 1917 1917-02-28
[X128C10C], Letter from Thomas Alva Edison to Josephus Daniels, March 7th, 1917 1917-03-07
[X128C10D], Letter from Josephus Daniels to Thomas Alva Edison, March 26th, 1917 1917-03-26