This notebook was used by Absalom M. Kennedy in April 1917 for notes on experimental work for the U.S. Navy performed under the direction of Edison during World War I. The book consists primarily of notes on experiments involving amplifiers, audion circuits, transmitters, and transmitter parts. Also included are notes describing experiments with the "Edison Effect." Several entries include notations by Edison or remarks by Kennedy about his opinions and suggestions. The notes indicate that E. Rowland Dawson and Joe Meilner also worked on these experiments and that some of them took place at sea near Sandy Hook and Red Bank, New Jersey. The front cover is labeled "Experiments #3 March 21 -." The pages are unnumbered, and some have been removed from the middle of the book. Approximately 120 pages have been used.