This notebook covers the periods May-July 1882, March 1883, and April 1885. The entries are by Edison and John Ott. Some of the entries were witnessed by Charles T. Hughes. Most of the material relates to electric lighting. Included are drawings of armatures and notes and drawings of automatic voltage regulators, lamps, and meters. Included also are notes and drawings of the sextuplex telegraph and notes relating to a process for compressing bran. A few pages appear to have been used by a child for drawing, writing, and math exercises. The book contains 278 numbered pages.

Blank pages: 8-9, 80-89, 112-119, 126-137, 144-147, 150-151, 154-161, 170-203, 208-237, 256-261, 266-271.

Missing page numbers: 97-98, 109-110, 273-274.