PLANCK, MAX.

Zur Theorie der Wärmestrahlung.

Leipzig, Barth, 1910. 8vo. Contemp. hcalf. Gilt spine, titlelabel with gilt lettering. Spine a bit rubbed and lower part of hinge weakening. In: "Annalen der Physik und Chemie. Hrsg. von G. Wiedemann", Vierte Folge, Bd. 31.. VIII,1064 pp. and 6 plates. (Entire volume offered). Planck's paper: pp. 758-768. Internally clean and fine.

First printing of an importent paper in which Planck tries to ecplains some of the difficulties with the quantum theory by pointing to the central exchange of energy between matter and radient energy and criticising Jean's theory.

"Planck explained his point of view in some detail in an article which he submitted (the paper offered) in January 1910... There he reviewed the main progress in radiation theory that had taken place since 1900, and also indicated his own attitude towards it. Two extreme points of view, he said, could be assumed. The most conservative way was raken by Jans, who had derived from the equations of classical mechanics and electrodynamics the classical radiation equation. Since the equation obviously disagreed with experiments, the necessity arose to find a way of modifying the equations of dynamics so as to include the existence of the quantum of action 'h'." (Mehra & Rechenberg Vol. I:1, pp. 123 ff.).

Order-nr.: 48874