title: Address of the President, Professor A.L. Hodgkin, at the Anniversary Meeting, 30 November 1971. Recent work on visual mechanisms.
mesh_terms: D000200:Action Potentials; D000818:Animals; D003530:Cyprinidae; D004594:Electrophysiology; D008027:Light; D008854:Microscopy, Electron; D010786:Photoreceptor Cells / Q000502:physiology*; D012160:Retina / Q000166:cytology / Q000502:physiology; D012168:Retinal Pigments / Q000502:physiology; D012754:Sharks; D013057:Spectrum Analysis; D014426:Turtles; D014785:Vision, Ocular
chemical_list: D012168:Retinal Pigments