2 5 2 D O C . 1 3 1 D I S C U S S I O N O N R E L A T I V I T Y [15]Jean Perrin (1870–1942) was Professor of Physical Chemistry at the Sorbonne. [16]Jean Becquerel (1878–1953) was Professor of Physics at the Muséum national d’histoire naturelle. [17]Mie 1920. [18]Léon Brunschvicg (1869–1944) was Professor of Philosophy at the Sorbonne. [19]Edouard le Roy (1870–1954) was Professor of Mathematics at the Lycée Saint-Louis. [20]Henri Bergson (1859–1941) was Professor of Modern Philosophy at the Sorbonne. His book on duration and simultaneity (Bergson 1922) appeared only later in 1922 (see Bergson 1972, pp. 1599–1600). [21]Emile Meyerson (1859–1933) was a philosopher and director of the Jewish Colonisation Asso- ciation for Europe and Asia Minor in Paris. [22]For Nietzsche’s concept of eternal return, see Nietzsche 1886–1891, especially the chapter “Der Genesende.” For a discussion, see Abel 1984. Svante Arrhenius expounded his views on the subject in Arrhenius 1907. [23]Ernst Mach. [24]“No one can tell how the experiment would evolve if the walls of the container were to get ever thicker and more massive, until they were eventually several miles thick” (“Niemand kann sagen wie der Versuch verlaufen würde, wenn die Gefässwände immer dicker und massiger, zuletzt mehrere Meilen dick würde” Mach 1883, p. 217). [25]Hippolyte Taine (1828–1893). [26]Georg W. F. Hegel (1770–1831). [27]John Stuart Mill (1806–1873). [28]Nicolas Malebranche (1638–1715). [29]Einstein 1905k (Vol. 2, Doc. 16). Léon G. Gouy (1854–1926) was Professor of Physics at the University of Lyon. Einstein acknowledged Gouy’s experimental results in Einstein 1906b (Vol. 2, Doc. 32). [30]Henri Piéron (1881–1964) was director of the Laboratory of Physiological Psychology at the Sorbonne.