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 Baedeker from Bädeker with the umlaut to Baedeker around 1850. Karl Baedeker was born in Essen, then in the Kingdom of Prussia, on November 3, 1801. After his schooling in Hagen, he left home in 1817 to study humanities in Heidelberg where he also worked for a while at the leading local bookseller J.C.B. Mohr. Military service followed, after which he moved to Berlin where he worked as an assistant at Georg Andreas Reimer, one of the leading booksellers in the city, from 1823 to 1825. He then returned home to Essen and worked with his father until 1827 when he