Baedeker running of the firm. 1859−1861: Following the death of Karl Baedeker, his eldest son Ernst Baedeker (1833−1861) became the head of the firm. After his training as a bookseller in Braunschweig, Leipzig and Stuttgart, he had spent some time at the English publishing house "Williams & Norgate" in London. On New Year's Day, 1859, he had joined his father's publishing firm as a partner and just ten months later he was running it on his own. His tenure at the helm of the firm saw the publication of three new travel guides in 1861 viz the first Baedeker travel guide
Karl Baedeker (scientist) This was the first example of doping a semiconductor to change its properties and also the discovery of transparent conductive materials. He also observed a Hall effect in transparent copper iodide thin films that had the reverse sign to that in copper, an observation of what was later to be known as conduction by electron holes in semiconductors. This observation was critical in developing the theory of electron conduction in solids. Along with his graduate student Karl Steinberg, Baedeker studied the effect of varying concentration of iodine on the electrical properties of copper iodide. He also is credited with making