This letterbook covers the period February-April 1915. Most of the correspondence is by Edison and William H. Meadowcroft. The letters mainly relate to World War I, the disruption of markets for the carbolic acid (phenol) used in the manufacture of phonograph records, and Edison's production of chemicals for his businesses, including the establishment of benzol absorbing plants in Johnstown, Pennsylvania, and Woodward, Alabama. There are also references to other business propositions, including the sale of Edison's surplus stocks of benzol, toluol, and other chemical products. The correspondents include Edward R. Stettinius of J. P. Morgan & Co. and representatives of Mitsui & Co.
The spine is stamped "Letters" and is marked "T.A.E. From Feb. 13, 1915 to Mar. 31 1915." The number "40" also appears on the spine. The book contains 701 numbered pages and an index. Approximately 15 percent of the book has been selected. Courtesy of Thomas Edison National Historical Park.