Mainly scientific papers (1917-1946) covering Davisson's major research areas while he was employed by the Bell Telephone Laboratories, inc., and the Western Electric Company and some correspondence (chiefly personal). Includes MSS. of articles accompanied by research notes and statistics; MSS. relating to his study of the secondary emission of electrons; materials relating to electron optics, the construction of instruments for electron focusing, and crystal physics used to develop quartz crystal plates as circuit elements; and his lecture notes at the University of Virginia (1947-1948). Some of the correspondence discusses Davisson's confirmation of the wave properties of electrons.