Jourdanet’s observational work in remote areas of Latin America and Asia produced important evidence for Bert’s proof that altitude sickness is due to anoxemia. In La pression barométrique (No. 944) Bert described how Jourdanet made it possible for him to do his laboratory work on altitude physiology, and how the two agreed to each take half the field: Bert, the laboratory work; and Jourdanet, the observational. Bert also credits Jourdanet with the theory of anoxemia. Extensively illustrated. Second edition, 2 vols., 1876. See No. 935.2. Digital facsimile of the 1875 edition from the Internet Archive at this link.