Hermann Ludwig Ferdinand von Helmholtz (1821-1894)
Hermann Ludwig Ferdinand von Helmholtz (1821-1894). German physicist and physiologist, giving a lecture on 7 July 1894. Opthalmascope
Picture No
13907782
Media ID
48515316
Size
6000px x 7335px
(3.7MB)
Credit
World History Archive / Mary Evans Picture Library
Source
World History Archive





























