Karl Baedeker (scientist) Karl Baedeker (scientist) Karl Wilhelm Sali Baedeker (3 February 1877 – 6 August 1914) was a German physicist, and a professor at the University of Jena. He was the grandson of Karl Baedeker, the founder of the eponymous travel guide publishing house, and the son of Fritz Baedeker (1844 - 1925), who ran the same company from 1869 until his death in 1925 (see Baedeker). One of his scientific discoveries was that the resistivity of cuprous iodide (CuI) depended on its stoichiometry. Thin films of the material became much more conductive when exposed to iodine vapor; the effect was reversible.
Karl Alexander, 5th Prince of Thurn and Taxis Karl Alexander, 5th Prince of Thurn and Taxis Karl Alexander, 5th Prince of Thurn and Taxis, full German name: "Karl Alexander Fürst von Thurn und Taxis" (22 February 1770, Imperial City of Regensburg, Holy Roman Empire, 15 July 1827, Schloss Taxis, Dischingen, Kingdom of Württemberg) was the fifth Prince of Thurn and Taxis, head of the Thurn-und-Taxis-Post, and Head of the Princely House of Thurn and Taxis from 13 November 1805 until his death on 15 July 1827. With the death of his father on 13 November 1805, he became nominal "Generalpostmeister" of the Imperial Reichspost until the resignation of