This notebook contains dated entries from November 1888. All entries are by Edison. At the beginning of the book are undated notes and drawings relating to phonograph designs, cylinder compounds and designs, and insulation compounds. There are also notes and calculations regarding electric lighting and a memorandum about a combination with Thomson-Houston. At the end of the book are notes on chemical experiments, a drawing of a dynamo armature, and notes and drawings pertaining to phonograph designs. The pages are unnumbered, and the book has been used in both directions. Approximately 140 pages have been used. Courtesy of Thomas Edison National Historical Park.