This notebook covers the period December 1878-January 1879. Most of the entries are by Francis Upton. There are also entries by Edison and Charles Batchelor. Some entries have been signed by Edison. Almost all of the material relates to experiments on electric lighting. Included are calculations by Upton about generators and electric distribution systems, with a few calculations by Edison; notes and drawings of lamps; and notes and drawings of generators. There are also notes by Upton on miscellaneous subjects, from etheric force, electricity, magnetism, and phosphorescence to light and heat. Similar notes can be found in Menlo Park Notebook #15. The book contains 282 numbered pages.

Blank pages: 88-89, 198-201, 280-281.