The dated items in this folder cover the period 1877-1929. They include technical notes and drawings signed by Edison, Charles Batchelor, and Francis Jehl. The names of John Kruesi, Francis R. Upton, and other Menlo Park employees also appear in the documents. Subjects covered include the telegraph, the telephone, the incandescent lamp, and various matters of interest to Edison in his later years. The items have been arranged in chronological order.
A series of technical notes, with instructions for Batchelor, John W. Lawson, and William Holzer, describes experiments on lamps and filaments made in January 1881. Related material can be found in John W. Howell's notebook, Cat. 1301, Charles Batchelor Collection , beginning at MBN007AAE). The items by Edison include a five-page set of instructions from July1883 regarding central station operation; six pages of calculations relating to the possible electrical illumination of Llewellyn Park, made in November 1883 (more than two years before he moved there); and notes about Jonas Walter Aylsworth's storage battery experiments (see also Storage Battery Notebook (1902) in the Ford Museum collection). Courtesy of the Henry Ford Museum and Greenfield Village Research Center.