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ARMAND HIPPOLYTE LOUIS FIZEAU (1819–1...

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Originally appearing in Volume V10, Page 452 of the 1911 Encyclopedia Britannica.
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ARMAND HIPPOLYTE

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LOUIS
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FIZEAU (1819–1896)  ,
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French physicist, was
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born at
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Paris on the 23rd of
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September 1819 . His earliest
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work was concerned with improvements in photo-graphic processes; and then, in association with J . B . L .
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Foucault, he engaged in a
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series of investigations on the interference of
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light and
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heat . In 1849 he published the first results obtained by his method for determining the
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speed of
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propagation of light (see LIGHT), and in 185o with E . Gounelle measured the velocity of
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electricity . In 1853 he described the employment of the
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con-denser as a means for increasing the efficiency of the
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induction-coil . Subsequently he studied the expansion of solids by heat, and applied the phenomena of interference of light to the measurement of the dilatations of crystals . He died at Venteuil on the 18th of September 1896 . He became a member of the French
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Academy in 186o and of the
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Bureau
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des Longitudes in 1878 .

End of Article: ARMAND HIPPOLYTE LOUIS FIZEAU (1819–1896)
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