WEBER, HEINRICH FRIEDRICH.

Die specifischen Wärmen der Elemente Kohlenstoff, Bor und Silicium. (2 Parts).

Leipzig, Johann Ambrosius Barth, 1875. Contemp. hcalf. Spine gilt. raised bands. Spine slightly rubbed. In "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff", Bd. 154. X,644 pp. and 5 folded engraved plates. (Entire volume offered). Weber's paper: pp. 367-423 a. pp. 553-582.

First appearance of this importent paper in which Weber was able to explain why the Law of Dulon & Petit, based on the specific heat of only thirteen elements, was only approximately true. "An explanation of this anomalous behaviour is to be found in the fact that, as shown by the physicist Heinrich Friedrich Weber, and confirmed by many workers in more recent times, the atomic heat increases at different rates with rise of temperature.... A theoretical basis for this law was obtained in more recent times by P. Debye."(Findley "A Hundred Years of Chemistry", p. 77-78).

"The three curious exceptions (C, B, Si) to the Dulong-Petit Law which were until now a cause for despair have been eliminated: the Dulong-Petit law for the specific heats of solid elements has become an exceptional rigorous law..."(Weber).

On Albert Einstein and Weber's specific heat, see Pais: "Subtle is the Lord", pp. 389 ff.

Order-nr.: 45933