BIOGRAPHIES 387 Habilitationsschrift on John Milton. 1872-1873, Privatdozent at University of Göttingen. 1873-1887, Professor of History at University of Bern. 1877- 1879, published two-part Milton biography. 1881, married Clara Stern, with whom he had three daughters published Geschichte der Revolution in England. 1887-1928, Professor of History at ETH. 1889, published two-volume Mirabeau biography. 1894-1924, published ten-volume Geschichte Europas (1815-1871), his magnum opus. 1896-1900, was frequently visited at home by Einstein. 1912-1914, resumed close relationship with Einstein. Einstein later referred to his visits to the Stern family as the "schönsten und edelsten Erinnerungen meiner jungen Jahren." Sources: Stern 1932 Neue Zürcher Zeitung, 29 March 1936 Zeitschrift für Schweizerische Geschichte 16 (1936): 429-430 Einstein corre- spondence with Stern family. Weber, Heinrich Friedrich b. 7 November 1843 in Magdala, Thuringia d. 24 May 1912 in Zurich Einstein's physics professor at ETH. Son of a merchant. Attended Gymnasium in Weimar. 1862-1865, studied mathematics, physics, and philosophy at University of Jena. 1865, University of Jena doctoral dissertation, "Neue Probleme der Diffraktionstheorie des Lichtes." 1865-1869, worked under Kirchhoff in Heidelberg gave private instruction in physics and mathematics in Pforzheim, Baden. 1870-1871, Assistent to Wiedemann at Polytechnische Schule, Karlsruhe. 1871-1874, Helmholtz's first Assistent at University of Berlin published papers on anomalous low-temperature behavior of specific heats of carbon, boron, and silicon, which were later cited by Einstein. 1874- 1875, Professor of Physics and Mathematics at Königliche Württembergische Akademie, Hohenheim. 1875, married Anna Hochstetter, with whom he had eight children. 1875-1912, Professor of Mathematical and Technical Physics at ETH. 1878-1912, conducted research on alternating current technology and other problems of emerging electrotechnical industry attended interna- tional congresses on standardizing electrical units in Vienna (1883), Paris (1889, 1900), Frankfurt (1891), London (1908). 1881-1912, member, then vice president and president, of Swiss Meteorological Commission. 1884, published revision of Siemens's resistance unit, which was accepted as the standard. 1886-1890, established new physics institute at ETH, with help of Siemens, which included some of the world's best-equipped laboratories for physical and technical research. 1887-1888, proposed general theory of the electric lamp, including an empirical law for black body energy distribution. 1897-1900,