This notebook was used by Edison in February 1916 for notes on the composition of disc record blanks and the application of varnish surfaces during the transfer and printing process. Included are notes describing a sequence of experiments numbered from 374E to 430E. The entries indicate results obtained from varying the proportions of ingredients in the varnish surfaces or the oven baking schedules for the disc records. The summary of results usually provides a tally of acceptable and unacceptable record surfaces, transfers, and prints obtained. Also included are experiments involving attempts to reduce bubbles and wrinkles on record surfaces. Some notes are in the form of instructions to Sherwood T. (Sam) Moore or other employees. One additional page of notes has been taped into book, and several items by Edison, including a table summarizing the results of experiments 387E-409E, have been inserted loose into the book. The front cover is labeled "Disc 7." The pages are unnumbered. Approximately 100 pages have been used. Courtesy of Thomas Edison National Historical Park.