Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, 1894
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Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, 1894
Hermann Ludwig Ferdinand von Helmholtz, German physicist and physiologist, 1894. Among his many contributions to science Helmholtz (1821-1894) invented the opthalmascope and formulated the law of conservation of energy. From La Nature. (Paris, 1894)
Media ID 14836604
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