This letterbook covers the period November-December 1915. Most of the correspondence is by Edison and William H. Meadowcroft. Numerous items relate to the technical and commercial development of motion pictures, phonographs, and phonograph recordings. There is also correspondence concerning Edison's benzol absorbing plants and chemical manufacturing interests, as well as business conditions during World War I. Additional items pertain to personnel changes at Edison's motion picture studio, industrial safety, the Naval Consulting Board, and Edison's opinion about high-school education for boys and girls. The correspondents include chemist and inventor Leo H. Baekeland; longtime Edison associate Herman E. Dick; engineer and inventor William L. Saunders, president of the Ingersoll-Rand Co.; and representatives of J. P. Morgan & Co. and Mitsui & Co.

The spine is stamped "Letters" and is marked "T.A.E. From Nov. 5- 1915 To Dec. 16- 1915." The number "46" also appears on the spine. The book contains 701 numbered pages and an index. Approximately 10 percent of the book has been selected.