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La 4e de couverture indique : "Hermann von Helmholtz fut l'un des scientifiques les plus influents de la seconde moitié du XIXe siècle. Sa soif de connaissances et son immense savoir, à la fois en médecine, en physique et en mathématiques, lui permirent de conjuguer plusieurs disciplines. La formulation mathématique de la loi de conservation de l'énergie fut sa contribution la plus notable, la première aussi. Elle fut appliquée à la physiologie et permit de mesurer la vitesse des impulsions nerveuses. Ce scientifique allemand s'intéressa également à l'optique, proposant une théorie de la vision et inventant l'ophtalmoscope et l'ophtalmomètre. Enfin, il se pencha également sur l'acoustique et mena des recherches sur la propagation du son et sur sa perception par l'oreille humaine, tissant un lien entre la physiologie et l'harmonie et la musique."

Helmholtz, Hermann von

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1821-1894 --- Helmholtz, Hermann von,

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"This work is a record of the achievements in scientific discovery and invention of one of the greatest minds of the nineteenth century. Hermann Helmholtz was one whose private life was known only to a few, and he would have instinctively recoiled from biographical revelations of a purely personal character. At the same time, I have endeavoured to give the reader some idea of the man--calm, placid, reserved, thoughtful--whose love of truth, yearning spirit of inquiry, and great intellectual powers give him a place in the front ranks of the interpreters of Nature. A life full of intellectual activity, creative, ever productive, could not contain much in the way of trivial incident. I have also tried, by following a historical method, to trace the history of any branch of inquiry up to the point when it came under the survey of Helmholtz, and then I have given an account of the contributions made by himself. Few are able to tread in the footsteps of Helmholtz, even although these are carefully pointed out by a competent guide; but this volume may at all events give an outline of the paths along which he trod"--Preface. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

Helmholtz, Hermann von, --- 1821-1894

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Senses and sensation. --- Perception. --- Helmholtz, Hermann von,

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Senses and sensation --- Perception --- Sens et sensations --- Helmholtz, Hermann von,