This notebook contains dated entries from May, October, and December 1902, and November 1903. All entries are by Edison. The book contains notes and drawings regarding chemicals that produce "electric[ity] by friction"; these notes may be related to motograph experiments. Also included are entries pertaining to storage batteries and phonograph recording apparatus, along with several rough phonograph drawings. A marginal notation indicates that some of this material was recopied into an unidentified "big book." The pages are unnumbered. Approximately 70 pages have been used.
Courtesy of Thomas Edison National Historical Park.