Hermann von Helmholtz
Physicist
1821-08-31 – 1894-09-08
Hermann von Helmholtz was a German physicist and physician who made major contributions to physiology, optics, acoustics, and electrodynamics. He formulated a general statement of the conservation of energy and advanced modern sensory physiology. His work influenced both experimental science and philosophy of science.
Books by Hermann von Helmholtz
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Hermann Von Helmholtz, an Autobiographical Sketch
An Address Delivered on the Occasion of His Jubilee, 1891
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Selected Writings of Hermann Von Helmholtz
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Helmholtz's Treatise on Physiological Optics
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Quotes by Hermann von Helmholtz
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Not that I wish by any means to deny, that the mental life of individuals and peoples is also in conformity with law, as is the object of philosophical, philological, historical, moral, and social sciences to establish.
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Iron which is brought near a spiral of copper wire, traversed by an electrical current, becomes magnetic, and then attracts other pieces of iron, or a suitably placed steel magnet.
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I then endeavoured to show that it is more especially in the thorough conformity with law which natural phenomena and natural products exhibit, and in the comparative ease with which laws can be stated, that this difference exists.
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The older view of the nature of heat was that it is a substance, very fine and imponderable indeed, but indestructible, and unchangeable in quantity, which is an essential fundamental property of all matter.
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The law in question asserts, that the quantity of force which can be brought into action in the whole of Nature is unchangeable, and can neither be increased nor diminished.
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Now, the external work of man is of the most varied kind as regards the force or ease, the form and rapidity, of the motions used on it, and the kind of work produced.
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Windmills, which are used in the great plains of Holland and North Germany to supply the want of falling water, afford another instance of the action of velocity. The sails are driven by air in motion - by wind.
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