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 Ridderbusch presence survives on two commercial videos; as Fafner in Karajan's filming of his Salzburg "Rheingold" and as Kecal, the marriage broker, in a German-language version of "The Bartered Bride". Solo recordings include "Karl Ridderbusch: a portrait" and an eponymous double album, both listed by German vendors, and a Loewe recital on LP for Deutsche Grammophon, since anthologised as part of a double CD release of the composer. Karl Ridderbusch Karl Ridderbusch (29 May 1932 – 21 June 1997) was a German operatic bass, associated in particular with the music of Wagner. He was recognised as a notable exponent of the