CHRONOLOGY, APRIL-OCTOBER 1910 625 April 21 May 7 July 14 July 15 July 28 August 5 August 29 August 29 September 6 September 23 September 24 October 8 October 17 Proposed as a candidate for a chair of theoretical phys- ics at the German University of Prague. Delivers lecture "On the Theory of Light Quanta and the Question of the Localization of Electromagnetic Energy" to the Neuchätel meeting of the Schweizer- ische Physikalische Gesellschaft (Vol. 3, Doc. 5). The Zurich Governing Council grants Einstein a salary increase to 5500 francs beginning in October in order to dissuade him from accepting an offer from the German University of Prague. "On the Ponderomotive Forces Acting on a Magnetic Body Carrying a Current" (Vol. 3, Doc. 6). Einstein's second son Eduard is born in Zurich (f 1965, Zurich). The summer semester at the University of Zurich ends. "On a Theorem of the Probability Calculus and Its Application in the Radiation Theory" (with Ludwig Hopf) (Vol. 3, Doc. 7). "Statistical Investigation of a Resonator's Motion in a Radiation Field" (with Ludwig Hopf) (Vol. 3, Doc. 8). Delivers lecture version of "On the Ponderomotive Forces Acting on a Magnetic Body Carrying a Current" to the Basel meeting of the Schweizerische Naturfor- schende Gesellschaft. Dedication by Otto Lummer on title page of Abbe 1910: "Dem Schöpfer der Relativitätstheorie voll Bewunde- rung, die Verfasser. Mit besten Grüßen, O Lummer," "Breslau 23/9 1910." Provenance: Einstein's personal library. Travels to Vienna to consult with the Habsburg authori- ties on a position at the German University of Prague he also visits Ernst Mach, Victor Adler, and Anton Lampa at this time. "The Theory of the Opalescence of Homogeneous Fluids and Liquid Mixtures near the Critical State" (Vol. 3, Doc. 9). The winter semester at the University of Zurich begins: Einstein teaches courses in electricity and magnetism (Vol. 3, Doc. 11) and in selected readings in theoretical