title: Herman von Helmholtz, 1821-1894 physician, musician and versatile scientist.
mesh_terms: D005858:Germany; D049672:History, 19th Century; D009146:Music / Q000266:history*; D009885:Ophthalmology / Q000266:history*; D009887:Ophthalmoscopy / Q000266:history; D012586:Science / Q000266:history*