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accommodation appear aqueous humour becomes blood vessels blue bright bundles called canal central centre changes choroid ciliary muscle ciliary nerves ciliary processes cochlea colour sensations constriction cornea corresponding Corti dilating dioptric direction distance distinct effect epithelium excited eyeball fibrils field of vision focus front ganglionic give rise green hair-cells hence Hering's theory horizontal inner limb inner nuclear layer iris katabolic lens less long ciliary nerves luminous point lymphatic macula malleus movements muscular needle nervous nucleus optic fibres optic nerve ora serrata outer limbs outer molecular layer pass perilymph pigment epithelium posterior primary sensations produced pupil rays of light rectus refractive retina retinal cup retinal image rise to visual rod cells rods and cones sclerotic seen shew shewn sound spectrum stimulation structures suppose surface suspensory ligament tympanic membrane tympanum vertical vibrations visual axis visual impulses visual sensations vitreous humour wave-lengths yellow Young-Helmholtz theory
Page 465 - Pure gold throughout." — GUARDIAN. " Unquestionably the clearest and most complete elementary treatise on this subject that we possess in any language.
Page 315 - I, the base of the tongue; e, the upper free part of the epiglottis, e', the tubercle or cushion of the epiglottis; ph, part of the anterior wall of the pharynx behind the larynx ; in the margin of the aryteno-epiglottidean fold...
Page 230 - ... instantly restored. Or the balance, on which silence depends, may be upset by connecting the ear with a tube, whose other end lies close to the mouth of one of the pipes. By means of beats two notes may be tuned to unison with great exactness. The object is to make the beats as slow as possible, since the number of beats in a second is equal to the difference of the frequencies of the notes. Under favourable circumstances beats so slow as one in 30 seconds may be recognised, and would indicate...
Page 463 - FRS , Professor of Physiology in the University of Cambridge, and Fellow of Trinity College, Cambridge.
Page 467 - PRACTITIONER (THE) : A MONTHLY JOURNAL OF THERAPEUTICS AND PUBLIC HEALTH. Edited by T. LAUDER BRUNTON. MD, FRCP, FRS, Assistant Physician to St.
Page 413 - London, 1891. evidence that the organ becomes more vascular during mental activity. . . ." That sleep concerns the whole body, and not the brain alone, is well put by Sir Michael Foster. He says : " Though the phenomena of sleep are largely confined to the central nervous system, and especially to the cerebral hemispheres, the whole body shares in the condition. The pulse and breathing are slower; the intestine, the bladder, and other internal muscular mechanisms are more or less at rest, and the...
Page 468 - Assistant Physician to the Hospital for Consumption and Diseases of the Chest, Brompton ; Lecturer on Materia Medica at the Charing Cross School of Medicine and Assistant Physician to the Hospital Sm.
Page 93 - ... a mixture of red and blue. White again is quite distinct from all the colours in the narrower sense of that word, and black, which we must accept as a sensation, as an affection of consciousness, even if we regard it as the absence of sensation from the field of vision, is again distinct from everything else. Hence the sensations, caused by different kinds of light or by the absence of light, which thus appear to us distinct, and which we may speak of as ' native' or ' fundamental ' sensations,...