This notebook was used during June 1901. All entries are by Edison. Most of the book contains notes and drawings regarding the development of Edison's alkaline storage battery. Included are experiments using Edison-Lalande primary cells. There are also drawings pertaining to experiments with sound amplification for the phonograph using compressed air and other techniques. The front cover is marked "June 1901." The pages are unnumbered. Approximately 50 pages have been used.