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Ratzel, Friedrich

(Encyclopedia)Ratzel, Friedrich frēˈdrĭkh rätˈsəl [key], 1844–1904, German geographer. He traveled as a journalist in Europe (1869) and in Cuba, Mexico, and the United States (1872–75). Thereafter he devo...

Rückert, Friedrich

(Encyclopedia)Rückert, Friedrich frīˈmo͝ont rīˈmär [key], 1788–1866, German scholar and poet. An editor and professor of Oriental languages, he wrote imitations of Asian and Middle Eastern poetry and made ...

Spielhagen, Friedrich

(Encyclopedia)Spielhagen, Friedrich frēˈdrĭkh shpēlˈhägən [key], 1829–1911, German novelist. His works, chiefly on social and political themes, include Problematische Naturen (1861, tr. Problematic Charact...

Delbrück, Rudolf von

(Encyclopedia)Delbrück, Rudolf von dĕlˈbrük [key], 1817–1903, German statesman. He served (1857–76) under Bismarck as president of the chancellery of the North German Confederation (1866–71) and, after 1...

Eucken, Rudolf Christoph

(Encyclopedia)Eucken, Rudolf Christoph ro͞oˈdôlf krĭsˈtôf oikˈən [key], 1846–1926, German philosopher, studied at Göttingen and Berlin. He taught philosophy at Basel and became professor of philosophy at...

Hertz, Heinrich Rudolf

(Encyclopedia)Hertz, Heinrich Rudolf hĕrts [key], 1857–94, German physicist. He confirmed J. C. Maxwell's electromagnetic theory and in the course of experiments (1886–89) produced and studied electromagnetic...

Hess, Walter Rudolf

(Encyclopedia)Hess, Walter Rudolf, 1881–1973, Swiss physiologist. For his work on the control of organs by certain areas of the brain he shared with Egas Moniz the 1949 Nobel Prize in Physiology or Medicine. He w...

Glauber, Johann Rudolf

(Encyclopedia)Glauber, Johann Rudolf yōˈhän ro͞oˈdôlf glouˈbər [key], 1604–70, German alchemist. A forerunner of scientific chemists, Glauber made many practical advances in analytical chemistry; he devis...

Mössbauer, Rudolf Ludwig

(Encyclopedia)Mössbauer, Rudolf Ludwig, 1929–2011, German physicist, Ph.D. Max Planck Institute for Medical Research, Heidelberg, Germany, 1957. Mössbauer was a professor at the California Institute of Technolo...

Lotze, Rudolf Hermann

(Encyclopedia)Lotze, Rudolf Hermann ro͞oˈdôlf hĕrˈmän lōˈtsə [key], 1817–81, German philosopher and psychologist. After studying medicine and philosophy at Leipzig, he was lecturer in both departments an...