This notebook was used during the periods August-September 1917 and March-April 1918 by Edison, Henry G. Wolfe, and several other experimenters for notes pertaining to Edison's work for the U.S. Navy during World War I. At the beginning of the book are entries by Wolfe and an unidentified experimenter relating to experimental work on the water kite or kite rudder at Sag Harbor, New York, and others areas along the Atlantic coast. There are also notes by Wolfe regarding tests of decoy smoke screen pots. Other entries by Wolfe describe a series of camouflage experiments using colored paint conducted during September 1917 near Gardiners Point in Long Island Sound. Also included are notes by Wolfe and an unidentified experimenter on torpedo detection experiments in March 1918. The remaining entries from 1918 pertain to sound detection experiments by Edison, Wolfe, and two unidentified experimenters at Key West, Florida. Some of this work was done aboard the USS Sachem. Included is an 11-page note by Edison from March 30, which is the only extensive Edison entry in the book. The pages are unnumbered. Approximately 90 pages have been used. Several loose pages have been inserted into the book, and at least one page has been removed.