On two attempts to ascend Chimborazo / by Alexander von Humboldt ; translated from the German, and communicated at the request of the author by Martin Barry.

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On two attempts to ascend Chimborazo / by Alexander von Humboldt ; translated from the German, and communicated at the request of the author by Martin Barry. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.