Baedeker Baedeker Verlag Karl Baedeker, founded by Karl Baedeker on July 1, 1827, is a German publisher and pioneer in the business of worldwide travel guides. The guides, often referred to simply as "Baedekers" (a term sometimes used to refer to similar works from other publishers, or travel guides in general), contain, among other things, maps and introductions; information about routes and travel facilities; and descriptions of noteworthy buildings, sights, attractions and museums, written by specialists. 1827−1859: Karl Baedeker (see article) had three sons, Ernst, Karl and Fritz and after his death each, in turn, dictated by events, took over the
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