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.
Maximilian Karl, 6th Prince of Thurn and Taxis Thalers ended the era of the Thurn and Taxis family's postal monopoly. The handover took place on 1 July 1867. ! colspan="3" style="background: #bebebe; color: #000000" | Postal offices Maximilian Karl, 6th Prince of Thurn and Taxis Maximilian Karl, 6th Prince of Thurn and Taxis, full German name: "Maximilian Karl Fürst von Thurn und Taxis" (3 November 1802, Regensburg, Electorate of Bavaria – 10 November 1871, Regensburg, Kingdom of Bavaria) was the sixth Prince of Thurn and Taxis, head of the Thurn-und-Taxis-Post, and Head of the Princely House of Thurn and Taxis from 15 July 1827 until his death on