This notebook was used by Edison during May 1916 for notes on experiments to improve the manufacture of disc records. The entries at the beginning of the book give additional information on experiment 1065E, described in Book No. 12. The subsequent entries pertain primarily to experiments 1077E through1096E; there are also lists of other experiments to be performed. Included are tests involving different presses and varnish compounds, variations in the number of coats and methods of applying the varnish, and differing amounts of pressure and baking schedules. Flaws and successful results are both noted, along with the title of the musical selection used in the tests. Also included are notes on "drop tests" in which records were dropped on the blotting pad of Edison's desk to test their fragility. Some notes are in the form of instructions to Sherwood T. (Sam) Moore or Archie D. Hoffman. The front and back covers are labeled "No 13." The pages are unnumbered. Approximately 100 pages have been used. Courtesy of Thomas Edison National Historical Park.