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1 غمد شفايغر - زايدل
Schweigger-Seidel sheath -
2 Weber, Wilhelm Eduard
SUBJECT AREA: Electricity[br]b. 24 October 1804 Wittenberg, Germanyd. 23 June 1891 Göttingen, Germany[br]German physicist, the founder of precise measurement of electrical quantities.[br]Weber began scientific experiments at an early age and entered the University of Halle, where he came under the influence of J.S.C.Schweigger, inventor of the galvanometer. Completing his education with a dissertation on the theory of organ pipes and making important contributions to the science of acoustics, he was awarded a lectureship and later an assistant professorship at Halle. Weber was offered the Chair of Physics at Göttingen in 1831 and jointly with Gauss began investigations into the precision measurement of magnetic quantities. In 1841 he invented the electrodynamometer type of electrical measuring instrument. This was a development of the galvanometer in which, instead of a needle, a small coil was suspended within an outer coil. A current flowing through both coils tended to turn the inner coil, the sine of the angle through which the suspending wires were twisted being proportional to the square of the strength of the current. A variation of the electrodynamometer was capable of measuring directly the power in electrical circuits.The introduction by Weber of a system of absolute units for the measurement of electrical quantities was a most important step in electrical science. He had a considerable influence on the British Association committees on electrical standards organized in 1861 to promote a coherent system of electrical units. Weber's ideas also led him to define elementary electric particles, ascribing mass and charge to them. His name was used for a time before 1883 as the unit of electric current, until the name "ampere" was proposed by Helmholtz. Since 1948 the term "weber" has been used for the SI unit of magnetic flux.[br]Principal Honours and DistinctionsFRS 1850. Royal Society Copley Medal 1859.Bibliography1892–4, William Weber's Werke, 6 vols, Berlin.Further ReadingP.Lenard, 1954, Great Men of Science, London, pp. 263–70 (a reliable, short biography). C.C.Gillispie (ed.), 1976, Dictionary of Scientific Biography, Vol. XIV, New York, pp.203–9 (discusses his theoretical contributions).S.P.Bordeau, 1982, Volts to Herz, Minneapolis, pp. 172 and 181 (discusses Weber's influence on contemporary scientists).GW
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Schweigger — ist der Familienname folgender Personen: August Friedrich Schweigger (1783–1821), Naturforscher Franz Schweigger Seidel (24. September 1834 Halle – 23. August 1871 Halle) Franz Wilhelm Schweigger Seidel (* 1795 als Franz Wilhelm Seidel; † 1838),… … Deutsch Wikipedia
Schweigger — Schweigger, 1) Joh. Salomon Christoph, geb. 8. April 1779 in Erlangen, wurde 1803 Professor der Mathematik u. Physik in Baireuth, 1809 Director des Realinstituts in Augsburg, 1811 Professor der Physik am Realinstitut in Nürnberg, 1818 … Pierer's Universal-Lexikon
Schweigger — Schweigger, 1) Georg, Bildhauer und Bronzegießer, * Nürnberg 6. 4. 1613, ✝ ebenda 13. 6. 1690; schuf v. a. Porträtmedaillen in Bronze sowie in Stein geschnittene Kleinreliefs. Sein Hauptwerk sind die mit seinem Lehrer Christoph Ritter (* 1610,… … Universal-Lexikon
Schweigger — Schweigger, 1) Johann Salomo Christoph, Physiker, geb. 8. April 1779 in Erlangen, gest. 6. Sept. 1857 in Halle, studierte in Erlangen und habilitierte sich 1800 als Privatdozent, ward 1803 Professor der Mathematik und Physik am Gymnasium zu… … Meyers Großes Konversations-Lexikon
Schweigger — Schweigger, Joh. Salomo Christoph, Physiker, geb. 8. April 1779 zu Erlangen, gest. 6. Sept. 1857 als Prof. zu Halle, erfand den nach ihm benannten elektromagnetischen Multiplikator. – Sein Sohn Karl, Augenarzt, geb. 29. Okt. 1830 zu Halle, 1868… … Kleines Konversations-Lexikon
Schweigger [1] — Schweigger, Johann Salomo Christoph, Physiker, geb. 1779 zu Erlangen, wurde 1802 Professor der Mathematik und Physik am Gymnasium zu Baireuth, 1811 in Nürnberg, später Professor der Physik und Chemie in Erlangen, 1819 in Halle. Er erfand den nach … Herders Conversations-Lexikon
Schweigger [2] — Schweigger, Aug. Friedr., Bruder des Vorigen, verdienter Naturforscher, geb. 1783 zu Erlangen, 1809 Professor der Botanik u. Medicin zu Königsberg, von wo aus er öfter wissenschaftliche Reisen durch England, Frankreich u. Italien machte; st. 1821 … Herders Conversations-Lexikon
Schweigger-Seidel sheath — is a phagocytic sleeve that is part of a sheathed arteriole of the spleen, and is sometimes referred to as a splenic ellipsoid. It is a spindle shaped thickening in the walls of the second part of the arterial branches forming the penicilli in… … Wikipedia
Schweigger-Seidel — Franz, German physiologist, 1834–1871. See sheath of Schweigger Seidel … Medical dictionary
Schweigger-Seidel sheath — Schweig·ger Sei·del sheath (shviґgər siґdəl) [Franz Schweigger Seidel, German physiologist, 1834–1871] see under sheath … Medical dictionary
Schweigger-Seidel sheath — a spindle shaped thickening in the walls of the second portion of the arterial branches forming the penicilli in the spleen; see sheathed artery, under artery. Called also ellipsoid … Medical dictionary
