Note 4 — Chapter II
Reading edition
Einstein. Berlin Akad., Sitzungsberichte, 1925, p. 418. But Einstein’s view must be revised in view of recent experimental results (e.g. Harnwell, Phys. Rev., vol. 29, 1927, pp. 683 and 831), if these have been correctly interpreted. See Born, Zeitschr für Physik, vol. 40, pp. 177-8; and Jordan, Naturw. 1927, p. 792.