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Credit
Physiologie médicale de la circulation du sang : basée sur l'étude graphique des mouvements du coeur et du pouls artériel avec application aux maladies de l'appareil circulatoire / par E.J. Marey. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.