Address of the president Sir Alan Hodgkin, O.M. at the Anniversary Meeting, 30 November 1973 (Thomas Young).
D000818:Animals; D003118:Color Perception; D004739:England; D049672:History, 19th Century; D009885:Ophthalmology / Q000266:history*; D010786:Photoreceptor Cells / Q000502:physiology; D014426:Turtles