Memory of a wooded island in the Baltic Sea (Oak trees by the Sea) (1834-35) Carl Gustav Carus (German, 1789–1869). A man with a few strings to his bow - doctor of medicine, doctor of philosophy, professor of obstetrics, director of a maternity clinic - and wrote on art theory.

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In Leopold's maneuvers are a common and systematic way to determine the position of a inside the they are named after the german Christian G. Leopold, who described them in 1894.

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