Elemente der mathematischen Theorie der Elektricität und des Magnetismus. Aut.deutsche Ausg.von Gustav Wertheim.
Braunschweig, 1897. One corner of wrappers lacks. XIII,414 pp., 133 Illustr. - First German edition. In his work "The Discharge of Electricity through Gases, 1898" he calls his discovery of the electron a "copuscle".