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 August Senff with scientist Wilhelm Struve before going on to found the Nikolayev Astronomical Observatory in 1827. Karl August Senff Karl August Senff (12 March 1770 in Kreypau, Prussia – 2 January 1838 in Dorpat, Governorate of Livonia, Russian Empire) was a Baltic German painter, engraver and teacher. He is best known for his etchings of famous German and Estonian military figures in service to the Imperial Russian Army. He served as professor of drawing at the University of Dorpat (now University of Tartu) from its reopening in 1802 until his death in 1838 where he trained some of Estonia's most celebrated