Barcroft’s studies of the oxygen-carrying capacity of the blood are recorded in the above monograph. He particularly concentrated on elucidation of the oxygen dissociation curve. The second edition, 2 vols., Cambridge, 1925-28, was greatly revised and enlarged.

With C.G. Douglas, L.P. Kendal, & R. Margaria. The first recorded attack of bends pain experienced at low barometric pressures. The authors atttempted to find the maximum altitude at which work could be done effectively with the subject breathing pure oxygen.