Personal and business correspondence, laboratory notebooks, record books, scrapbooks, notes and sketches, patents and patent applications, and bookkeeping and legal records; employment records of laboratory and factory employees. Topics include: electricity and magnetism; instrumentation; optics; electrochemistry. Most major scientists and industrialists of his era are represented somewhere in the correspondence. Linear ft.); Phonograph Artist Files, ca. 1907-1929, 1950s-1980s (ca. 13.3 linear ft.); Phonograph Record Release Sheets, ca. 1915-1929 (ca. 8.3 linear ft.); Sussex County Iron Company, 1865-1895, 1901, 1913 (0.3 linear ft.); Thomas A. Edison, Inc., Moving Picture Division, 1898-1929 (ca. 48 linear ft.); and Thomas A. Edison, Inc., Phonograph Division, 1907-1931 (121 linear ft.). Record group 3 is comprised of personal papers of the following Edison affiliated individuals: Charles Batchelor, laboratory associate and business partner of Edison before the turn of the century; William Kennedy Laurie Dickson, an Englishman who worked with Edison principally on the development of motion pictures; Alexander Elliott, Jr., legal counsel for Edison; Mark M. Jones, created and directed the Thomas A. Edison, Inc. Personnel Service Department; Richard W. Kellow, the Secretary for Thomas A. Edison, Personal Interests, a division of Thomas A. Edison, Inc. in the 1910's and 1920s; John Kruesi, instrument maker who made models and apparatus for Edison; William Henry Meadowcroft, Edison's personal secretary; Harry Frederick Miller, who held various positions with Edison and his companies; and Francis Robbins Upton, a mathematician who joined Edison in 1878, working mainly on electric light.
