This notebook contains dated entries from June, September, and November 1903. Included are notes and drawings by Edison regarding storage batteries, phonograph recording and reproduction apparatus, and etheric force experiments. Some of the entries pertain to the use of storage batteries in automobiles. There is also a list of fifteen "probable causes" for loss of capacity in the Edison battery. At the beginning of the book is a 15-page list of chemical compounds compiled by an unidentified experimenter. The pages are unnumbered, and several pages have been removed from the book. Approximately 90 pages have been used.
Courtesy of Thomas Edison National Historical Park.