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Experiment to measure the quantity of carbonic acid eliminated in half an hour

Image depicts an experiment performed by Italian Professor Ugolino Mosso (1854-1909) at the Regina Margherita Hut to measure the quantity of carbonic acid eliminated in half an hour by a medical student, Beno Bizzozero. (Source: Mosso A. Life of man on the high Alps. Kiesow EL, trans. London: T Fisher Unwin, 1898.)