ZEEMAN, PIETER.

Lignes doubles et triples dans le spectre, produites sous l'influence d'un champ magnetique exterieur.

(Paris, Gauthier-Villars), 1897. 4to. No wrappers. In: "Comptes Rendus Hebdomadaires des Séances de L'Academie des Sciences", Tome 124, No 25. Pp. (1407-) 1486. (Entire issue offered). Zeeman's paper: pp. 1444-1445.

First French version of this importent paper in which Zeeman observed for the first time the splitting of the spectral lines into doublets and triplets. Here we have the first appearance of a charged particle much lighter than an atom, the first glimpse at the electron.
"In the spring of 1897, after his move to the University of Amsterdam, Zeeman resolved a magnetically "broadened" spectral line into the triplet of distinct polarized components that the Lorentz theory predicted for a sufficiently intense magnetic field. This in a very real sense was the peak of the Zeeman-Lorentz investigation of the Zeeman effect."(DSB).

Order-nr.: 49449