|
See also:DULONG, See also:PIERRE See also:- LOUIS
- LOUIS (804–876)
- LOUIS (893–911)
- LOUIS, JOSEPH DOMINIQUE, BARON (1755-1837)
- LOUIS, or LEWIS (from the Frankish Chlodowich, Chlodwig, Latinized as Chlodowius, Lodhuwicus, Lodhuvicus, whence-in the Strassburg oath of 842-0. Fr. Lodhuwigs, then Chlovis, Loys and later Louis, whence Span. Luiz and—through the Angevin kings—Hungarian
LOUIS (1785—1838) , See also:French chemist and physicist, was See also:born at See also:Rouen on the 12th (or 13th) of See also:February 1785. He began as a See also:doctor in one of the poorest districts of See also:Paris, but soon abandoned See also:medicine for scientific See also:research. After acting as assistant to Berthollet, he became successively See also:professor of See also:chemistry at the See also:faculty of sciences and the normal and veterinary See also:schools at Alfort, and then (182o) professor of physics at the lcole Polytechnique, of which he was appointed director in 1830. He died in Paris on the 18th (or 19th) of See also:July 1838. His earliest See also:work was chemical in See also:character. In 1811 he discovered chloride of See also:nitrogen; during his experiments serious explosions occurred twice, and he lost one See also:eye, besides sustaining severe injuries to his See also:hand. He also investigated the See also:oxygen compounds of See also:phosphorus and nitrogen, and was
• The names of the musical See also:instruments in those verses of the See also:Book of See also:Daniel have formed the basis of a controversy as to the authenticity of the book.
2 Histoire de la musique (Paris, 1869), vol. ii. p. 131.
3 See also:Music of the most See also:Ancient Nations (See also:London, 1864), pp. 42-3. ' Hommaire de See also:Hell, Voyage en Perse, p. lxii.
5 L'Harmonie universelle (Paris, 1636), livre iii. p. 174.
3 Syntagma musicum (See also:Wolfenbuttel, 1618), pl. 18 (3).
7 Pl. 36 (1).
3 Henn See also:Job. See also:Joachim Quantzens Lebenslauf von ihm selbst entworfen," in Fr. W. Marpurg's Histor. kritische Beytrage, Bd. L p. 207 (1754—1755)•
e Elementa musica, See also:chap. See also:xxvi.
one of the first to hold the See also:hydrogen theory of acids. In 1815, in See also:conjunction with See also:Alexis Therese See also:Petit (1791-1820), the professor of physics at the Ecole Polytechnique, he made careful comparisons between the See also:mercury and the See also:air thermometer. The first published research (1816) dealt with the See also:dilatation of solids, liquids and gases and with the exact measurement of temperature, and it was followed by another in 1818 on the measurement of temperature and the communication of See also:heat, which was crowned by the French See also:Academy. In a third, " On some important points in the theory of heat " (1819), they stated that the specific heats of thirteen solid elements which they had investigated were nearly proportional to their atomic weights—a fact otherwise expressed in the " See also:law of Dulong and Petit " that the atoms of See also:simple substances have equal capacities for heat. Subsequent papers by Dulong were concerned with " New determinations of the proportions of See also:water and the See also:density of certain elastic fluids " (1820, with See also:Berzelius); the See also:property possessed by certain metals of facilitating the See also:combination of gases (1823 with See also:Thenard); the refracting See also:powers of gases (1826); and the specific heats of gases (1829). In 1830 he published a research, undertaken with See also:Arago for the academy of sciences, on the elastic force of See also:steam at high temperatures. For the purposes of this determination he set up a continuous See also:column of mercury, constructed with 13 sections of See also:glass See also:tube each 2 metres See also:long and 5 mm. in See also:diameter, in the See also:tower of the old See also:- CHURCH
- CHURCH (according to most authorities derived from the Gr. Kvpcaxov [&wµa], " the Lord's [house]," and common to many Teutonic, Slavonic and other languages under various forms—Scottish kirk, Ger. Kirche, Swed. kirka, Dan. kirke, Russ. tserkov, Buig. cerk
- CHURCH, FREDERICK EDWIN (1826-1900)
- CHURCH, GEORGE EARL (1835–1910)
- CHURCH, RICHARD WILLIAM (1815–189o)
- CHURCH, SIR RICHARD (1784–1873)
church of St See also:Genevieve in the See also:College See also:Henri IV. The apparatus was first used to investigate the variation in the See also:volume of air with pressure, and the conclusion was that up to twenty-seven atmospheres, the highest pressure attained in the experiments, See also:Boyle's law holds See also:good. In regard to steam, the old tower was so shaky that it was considered unwise to See also:risk the effects of an See also:explosion, and therefore the mercury column was removed bodily to a See also:court in the See also:observatory. The See also:original intention was to push the experiments to a pressure See also:equivalent to See also:thirty atmospheres, but owing to the signs of failure exhibited by the See also:boiler the limit actually reached was twenty-four atmospheres, at which pressure the thermometers indicated a temperature of about 224°C. In his last See also:paper, published posthumously in 1838, Dulong gave an See also:account of experiments made to deter-mine the heat disengaged in the combination of various simple and See also:compound bodies, together with a description of the calorimeter he employed.
End of Article: DULONG, PIERRE LOUIS (1785—1838)
Additional information and Comments
There are no comments yet for this article.
Please link directly to this article:
Highlight the code below, right click, and select "copy." Then paste it into your website, email, or other HTML.
Site content, images, and layout Copyright © 2006 - Net Industries, worldwide.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are always encouraged.
|
del.icio.us it!