Physicist (mathematical physics, atomic physics, theoretical physics, wave mechanics, quantum mechanics). On the mineralogy faculty at Georg-August Universität zu Göttingen (1893-1897); on the mathematics faculty at Technische Universität Clausthal (1897-1900); on the mechanics faculty at the Technische Hochschule zu Aachen (1900-1906); and on the physics faculty at Universität München from 1906.
Physicist (mathematical physics, atomic physics, theoretical physics, wave mechanics, quantum mechanics). On the mineralogy faculty at Georg-August Universität zu Göttingen, 1893-1897; on the mathematics faculty at Technische Universität Clausthal, 1897-1900; on the mechanics faculty at the Technische Hochschule zu Aachen, 1900-1906; on the physics faculty at Universität Müchen from 1906.
Physicist (mathematical physics, atomic physics (theoretical physics, wave mechanics, quantum mechanics). On the mineralogy faculty at Georg-August Universität zu Göttingen (1893-1897); on the mathematics faculty at Technische Universität Clausthal (1897-1900); on the mechanics faculty at the Technische Hochschule zu Aachen (1900-1906); and on the physics faculty at Universität München from 1906.