The Five Senses of Man

action animals apparatus appear auditory canal auditory nerve basilar membrane body brain called camera obscura cause centre cochlea colours conveyed direction dissonance distance distinctly distinguish ear-bones Ernst Heinrich Weber Eustachian tube excited experience external ear fenestra ovalis fibres of Corti field of vision finger fundamental tone greater hand harmonics Helmholtz illusion imagine impression instance instrument irritation labyrinth lens look manner motion muscles nerve-fibres number of vibrations observed octave optic nerve organs of Corti outer papillæ passes peculiar perceive perception picture pitch position possess pressure produced Professor rays of light recognise refraction retina RICHARD ANTHONY PROCTOR seen sensation of light sense of locality sense of touch sensory circle sensory nerves sensory organs single skin smell sound sound-waves spectrum stereoscopic string substances suppose surface sympathetic vibrations tactile takes place taste terminal tion tongue tube tuning-fork tympanic cavity tympanic membrane violet waves whilst