This letterbook covers the period December 1915-January 1916. Most of the correspondence is by Edison and William H. Meadowcroft. Some of the letters pertain to Edison's benzol absorbing plants and chemical manufacturing interests. Included are several references to the fire at Edison's chemical plant in Silver Lake, New Jersey. There is also correspondence expressing Edison's opinions about matters relating to World War I. Other items deal with the technical and commercial development of motion pictures, phonographs, and storage batteries. The correspondents include investment banker Clarence Dillon, mathematician and electrical engineer Charles P. Steinmetz, phonograph collector Frederic Allen Whiting, and representatives of Mitsui & Co.
The spine is stamped "Letters" and is marked "T.A.E. From Dec. 16- 1915 To Jan. 27- 1916." The number "47" also appears on the spine. The book contains 702 numbered pages and an index. Approximately 15 percent of the book has been selected. Courtesy of Thomas Edison National Historical Park.