Baedeker of pre-1872 guides continued to be printed where all Baedeker guides had been produced before—the G.D. Baedeker printing works in Essen. Fritz ventured into territory none of his predecessors had covered before, inside and outside Europe e.g. Russia, Sweden, Norway, Palestine, Syria, Egypt, Greece, the Mediterranean, USA, Canada, India and South East Asia. Plans to publish guides on China and Japan had to be abandoned when war broke out in 1914. At home, the list of guides on German regions and cities continued to grow. His was the golden age of Baedeker travel guides. Fritz also had the good fortune
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