This undated notebook was probably begun in 1887, but it may have been used as early as 1886. All entries are by Edison. Included is a proposed plan for the West Orange laboratory and a list of schemes to be worked there. There are also several notes and drawings about telephone experiments, a few generator drawings, and notes on miscellaneous electrical and chemical experiments. At the beginning of the book is an itinerary for a trip by Edison to Philadelphia, Baltimore, and Washington. The last several pages contain addresses of individuals and firms in Continental Europe. The book has been used in both directions. The first 25 pages are numbered. Approximately 70 pages have been used. Courtesy of Thomas Edison National Historical Park.