Heidelberg, Germany/heidelberg052

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The discoverer of rubidium and cesium, Bunsen was solely occupied with experimentation and facts and resisted being drawn into theories: "One irrefragable and important act was worth an ocean of theories." In his last lectures of 1889, he did not even refer to the Periodic Law of Dmitri Mendeleev and Lothar Meyer, both of whom had worked with him in Heidelberg.