This undated pocket notebook, which was probably used in 1912, is not part of the run of "idea books" that constitute the majority of Edison's pocket notebooks. Instead, it contains notes by Edison on phonograph recordings. Some of the recordings are listed according to categories: reed orchestra, brass orchestra, brass and swing, instrumental quartets, general, and "explanatory talk." There are also references to the records being sent to baths A, B, and C. The pages are unnumbered. Approximately 25 pages have been used. Courtesy of Thomas Edison National Historical Park.