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See also:ANTOINE CESAR See also:BECQUEREL (1788-1878) , was See also:born at See also:Chatillon sur Loing on the 8th of See also:March 1788. After passing through the h See also:cole Polytechnique he became ingenieur-officier in 18o8, and saw active service with the imperial troops in See also:Spain from 1810 to 1812, and again in See also:France in 1814. He then resigned from the See also:army and devoted the See also:rest of his See also:life to scientific investigation. His earliest See also:work was mineralogical in See also:character, but he soon turned his See also:attention to the study of See also:electricity and especially of See also:electrochemistry. In 1837 he received the See also:Copley See also:medal from the Royal Society " for his various See also:memoirs on electricity, and particularly for those on the See also:production of metallic sulphurets and See also:sulphur by the See also:long-continued See also:action of electricity of very See also:low tension," which it was hoped would See also:lead to increased know-ledge of the " recomposition of crystallized bodies, and the processes which may have been employed by nature in the production of such bodies in the See also:mineral See also:kingdom." In biological See also:chemistry he worked at the problems of See also:animal See also:heat and at the phenomena accompanying the growth of See also:plants, and he also devoted much See also:- TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
- TIME, MEASUREMENT OF
- TIME, STANDARD
time to meteorological questions and observations. He was a prolific writer, his books including Traite d'electricite et du magnetisme (1834-1840), Traite de physique dans ses rapports aver la chimie (1842), Elements de l'electro-chimie (1843), Traite complet du magnetisme (1845), Elements de physique terrestre et de meteorologie (1847), and See also:Des climats et de l'See also:influence qu'exercent See also:les sots boises et Moises (1853). He died on the 18th of See also:January 1878 in See also:Paris, where from 1837 he had been See also:professor of physics at the Musee d'Histoire Naturelle.
His son, See also:ALEXANDRE EDMOND BECQUEREL (1820-1891), Was born in Paris on the 24th of March 182o, and was in turn his See also:- PUPIL (Lat. pupillus, orphan, minor, dim. of pupus, boy, allied to puer, from root pm- or peu-, to beget, cf. "pupa," Lat. for " doll," the name given to the stage intervening between the larval and imaginal stages in certain insects)
pupil, assistant and successor at the Musec d'Histoire Naturelle; . he was also appointed professor at the See also:short-lived Agronomic See also:Institute at See also:Versailles in 1849, and in 1853 received the See also:chair of physics at the See also:Conservatoire des Arts et Metiers. Edmond Becquerel was associated with his See also:father in much of his work, but he himself paid See also:special attention to the study of See also:light, investigating the photochemical effects and spectroscopic characters of See also:solar See also:radiation and the electric light, and the phenomena of See also:phosphorescence, particularly as displayed by the sulphides and by compounds of See also:uranium. It was in connexion with these latter inquiries that he devised his phosphoroscope, an apparatus which enabled the See also:interval between exposure to the source of light and observation of the resulting effects to
be varied at will and accurately measured. He published in 1867–1868 a See also:treatise in two volumes on La Lumiere, ses causes et ses effets. He also investigated the diamagnetic and paramagnetic properties of substances; and was keenly interested in the phenomena of electrochemical decomposition, accumulating much See also:evidence in favour of See also:Faraday's See also:law and proposing a modified statement of it which was intended to See also:cover certain apparent exceptions. He died in Paris on the 11th of May 1891.
End of Article: ANTOINE CESAR BECQUEREL (1788-1878)
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