This scrapbook covers the period January-December 1881. The entries are by Edison and relate primarily to electric lighting. Included are notes and drawings concerning lamps, generators, meters, regulators, electric power distribution, and other parts of the system. There is also some material pertaining to arc lights, electric railways, and ore milling. Many of the entries contain notes by Edison to Richard N. Dyer, his patent attorney, and to Samuel D. Mott, his patent draftsman. Mott's name also appears as a witness on many of the documents. The case number of Edison's patent application has been written on some of the items. Courtesy of Thomas Edison National Historical Park.