Vortrage und Reden von Hermann von Helmholtz: Zugleich Dritte Auflage der 'Popularen Wissenschaftlichen Vortrage' des Verfassers. Erster und Zweiter Band.

xi, 396; ix, 380 pp. Two volumes in one. 8vo. Maroon morocco spine & corners over light red cloth boards, gilt titles, green endpapers. A collection of Hermann von Helmholtz's lectures and speeches. von Helmholtz was a German physician, and an important figure in ophthalmology specifically, and the physiology of perception in general. He also made contributions to advancements in the sciences of mechanics and electromagnetism, and the largest association of research institutions in Germany bears his name (the Helmholtz Association).