Humboldt, Friedrich Heinrich Alexander von

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Humboldt, Friedrich Heinrich Alexander von (1769–1859) A Prussian naturalist and physicist, and great explorer, Humboldt made contributions to the study of volcanoes, vegetation and its relation to climate, ocean currents, and mountain ranges. He made a particular study of geophysics, aiming to collect and correlate all relevant data, and played an important role in the international geomagnetic survey of 1834, which determined declinations and inclinations world-wide.