The Five Senses of ManHenry S. King & Company, 1876 - 304 стор. |
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Результати 1-5 із 31
Сторінка 60
... suppose the whole field of vision to be depicted by a lens , then the image formed by the lens is not thrown upon an even surface , but upon a concave surface , whose centre lies in the lens . This accounts for the lines towards the ...
... suppose the whole field of vision to be depicted by a lens , then the image formed by the lens is not thrown upon an even surface , but upon a concave surface , whose centre lies in the lens . This accounts for the lines towards the ...
Сторінка 62
... Suppose that we are in a room at a little distance from the window , and that we then hold up a finger a few inches before one eye , and close the other ; if we now fix the eye steadily upon the finger so as to see it distinctly , the ...
... Suppose that we are in a room at a little distance from the window , and that we then hold up a finger a few inches before one eye , and close the other ; if we now fix the eye steadily upon the finger so as to see it distinctly , the ...
Сторінка 63
... suppose a luminous point a , fig . II , to be at a certain distance from the eye , then a distinct image of this point will be formed if the retina lies at the point of convergence c ; if , however , the retina is at a greater distance ...
... suppose a luminous point a , fig . II , to be at a certain distance from the eye , then a distinct image of this point will be formed if the retina lies at the point of convergence c ; if , however , the retina is at a greater distance ...
Сторінка 64
... imitated artificially . Let us suppose the eye to be adjusted for a great distance , such as some point upon the horizon , or in the sky . The rays from this point will penetrate the eye in almost parallel 64 THE FIVE SENSES OF MAN .
... imitated artificially . Let us suppose the eye to be adjusted for a great distance , such as some point upon the horizon , or in the sky . The rays from this point will penetrate the eye in almost parallel 64 THE FIVE SENSES OF MAN .
Сторінка 73
... suppose that in a short - sighted eye the image of a luminous point has been formed at B , and that the retina lies behind it at A ; now by making use of a pair of concave spectacles , the image will be formed upon the retina . The more ...
... suppose that in a short - sighted eye the image of a luminous point has been formed at B , and that the retina lies behind it at A ; now by making use of a pair of concave spectacles , the image will be formed upon the retina . The more ...
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Загальні терміни та фрази
action apparatus appear auditory canal auditory nerve basilar membrane binocular vision body brain cause centre Cloth cochlea colours consonance Demy 8vo direction dissonance distance distinctly ear-bones Eustachian tube excitement experience external ear Fcap fenestra ovalis fibres of Corti field of vision finger fixed fundamental tone harmonics Helmholtz Illustrations imagine impression instance instrument International Scientific Series inwards irritation labyrinth labyrinthine fluid lens light manner minor third motion muscles musical nerve-fibres number of vibrations objects observed octave olfactory olfactory nerve optic nerve organs of Corti papillæ peculiar perceive perception picture pitch Poems position possess post 8vo produced rays recognise resonator retina Second Edition seen sensation sense of touch sensitive fields sensory circle sensory organs skin Small crown 8vo smell sound sound-waves stereoscopic string substances suppose surface sympathetic vibrations takes place taste terminal tion tongue tube tuning-fork tympanic cavity tympanic membrane vols waves whilst
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