This notebook was used by Leroy E. Briggs during September 1913-January 1914 for experimental notes on an automatic film developing machine. The book consists primarily of a daily account of Briggs's activities, including experiments with new or improved parts made for the machine. There are occasional references to work on the home projecting kinetoscope and to the "other book" (N-13-05-22 [not selected]). The notes indicate that Briggs's work on the developing machine was overseen by Edison and Miller Reese Hutchison. There are occasional notations regarding Edison's opinions or suggestions. The notes also indicate that William Walter Dinwiddie, Absalom M. Kennedy, Charles W. Luhr and James W. Ramsay were involved in similar work. The front cover is labeled "Automatic Machine for Developing, Fixing and Drying Motion Picture Film. L.E. Briggs SO. 3300." The pages are irregularly numbered. Approximately 75 pages have been used. Courtesy of Thomas Edison National Historical Park.