Helmholtz's treatise on physiological optics : vol. 1. & 2 / Hermann von Helmholtz. Translated from the 3d German ed. Edited by James P. C. Southall. Handbuch der physiologischen Optik. English Treatise on physiological optics. Helmholtz, Hermann von, 1821-1894. Southall, James P. C. (James Powell Cocke), 1871- Physiological optics. QP475 .H48613 1962 612.84 HET Translation of Handbuch der physiologischen Optik, with additions made in 1924 by Southall. "An unabridged and corrected republication of the English translation first published ... in 1924[-25]" Includes bibliographies. New York : Dover Publications, 1962. 1962. 1962 Text 2 v. : eng engger