Jacob Leuthold, Agassiz's chief guide on his 1841 expedition in the Alps. Engraving from 'Louis Agassiz: His Life and Correspondence' (Boston, 1885). (Jean ) Louis (Rodolphe) Agassiz (1807-1873) Swiss-born American naturalist and glaciologist.

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Jacob Leuthold, Agassiz's chief guide on his 1841 expedition in the Alps. Engraving from 'Louis Agassiz: His Life and Correspondence' (Boston, 1885). (Jean ) Louis (Rodolphe) Agassiz (1807-1873) Swiss-born American naturalist and glaciologist.

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