The Bakerian Lecture. - An account of several new instruments and processes for determining the constants of a Voltaic circuit. - Rare Book Insider
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Wheatstone, Charles.

The Bakerian Lecture. – An account of several new instruments and processes for determining the constants of a Voltaic circuit.

(Lodndon Taylor ): 1843
  • $396
(30 x 23,5 cm). SS. 303-327. Mit 2 Kupfertafeln. Moderne Broschur, unaufgeschnitten. (Aus: Philosophical Transactions of the Royal Society). Erste Ausgabe der Verifikation des Ohmschen Gesetzes. - "In 1843 Wheatstone published an experimental verification of Ohm's law, helping to make the law (already well known in Germany) more familier in England. In connection with the verification he developed new ways of measuring resistances and currents. In particular, he invented the rheostat and popularized the Wheatstone bridge, originally invented by Samuel Christie" (DSB). - Die Tafeln gering stockfleckig, sonst sauber und wohlerhalten. - DSB 14, 289
More from Antiquariat Gerhard Gruber
book (2)
book (2)

Beiträge zur Theorie der Affinität und Valenz.

Werner, Alfred. (20,5 x 13 cm). (2) 41 S. Mit 18 Abbildungen. Broschur mit altem Material. (Sonderdruck aus: Vierteljahrschrift der Züricher naturf. Ges.). Erste Ausgabe seiner bahnbrechenden und sehr seltenen Habilitationsschrift. - "Werner spent the next two years working on his Habilitationsschrift, 'Beiträge zur Theorie der Affinität und Valenz,' in which he chose to attack the supreme patriarch of structural organic chemistry, August Kekulé. In this work Werner attempted to replace Kekulé's concept of rigidly directed valences with his own more flexible approach, in which he viewed affinity as a variously divisible, attractive force emanating from the center of an atom and acting equally in all directions. By the use of this new concept and without assuming directed valences, Werner was able to derive the accepted van't Hoff configurational formulas. Although this important paper contains the seeds that later flowered in the primary valence (Hauptvalenz) and secondary valence (Nebenvalenz) of the coordination theory, it deals exclusively with organic compounds. Unfortunately, it was published in a rather obscure journal of limited circulation, where it elicited little notice until brought to the attention of the scientific world in 1904 by a discussion of its concept in Werner's first textbook" (DSB). - Werner (1866-1919), Professor für Chemie in Zürich, begründet mit seinen Arbeiten über die Bindung der Atome in Molekülen die Stereochemie der anorganischen Verbindungen und erhält 1913 dafür den Nobelpreis für Chemie. - Titel gebräunt und gestempelt, sonst gut erhalten. - DSB 14, 264; Kauffman A7
  • $928