"Helmholtz." YourDictionary, n.d. Web. 15 January 2019. <https://www.yourdictionary.com/helmholtz>.
Helmholtz. (n.d.). Retrieved January 15th, 2019, from https://www.yourdictionary.com/helmholtz
Hermann Ludwig Ferdinand von 1821–1894
German physicist and physiologist who was a founder of the law of conservation of energy. Helmholtz did pioneering research on vision and invented an instrument for examining the interior of the eye in 1851.
Later in the same year he became assistant to Helmholtz in the physical laboratory of the Berlin Institute.
Imagining that this would interest Hertz and be successfully attacked by him, Helmholtz specially drew his attention to it, and promised him the assistance of the Institute if he decided to work on the subject; but Hertz did not take it up seriously at that time, because he could not think of any procedure likely to prove effective.
Lenard and Helmholtz, contain many biographical details, together with statements of the scope and significance of his investigations.