which differ from (22) only by a numerical factor of 2 and
respectively. The arguments of Garbasso are stated very briefly, but seem of a type similar to those of the present paper. The line of arguments of Gehrcke differs essentially from that used here.
[12] Note added during the proof.—In Verh. d. Deutsch. Phys. Ges. 1914, p. 20, K. Schwarzschild has discussed the problem of the effect of the field on the motion of the electron in some detail. In contrast to the above considerations he attempts to apply the results on the explanation of the Stark effect without leaving ordinary electrodynamics.
[13] Since the value of
differs widely from unity for all series of lines in the spectra of the heavier elements, it is to be expected that the electric effect should be very small, or undetectable for such elements.
[14] See G. Runge, Phys. Zeitschr. viii. p. 232 (1907).
[15] Ann. d. Phys. xxxix. p. 897 (1912), xl. p. 900 (1913).