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 on the title pages in both languages, further increased its sales, as his brother Adolph, who had opened a bookshop of his own in Rotterdam that year, sold it in Holland and also managed its sales in England. However, very few copies of the first edition have survived, which has made it one of the rarest and most sought-after Baedeker publications of all time. The "Conversationsbuch für Reisende" ("The Traveller's Manual of Conversation"), in four languages (English, German, French and Italian) which appeared later was based on this manual and for a long time, the stereotype editions remained unrivalled in