First published in 1925, this two-volume work deals with the blood's role in respiration. This first volume analyses the effect of high altitudes on the blood's ability to retain and diffuse oxygen. The text is illustrated with diagrams, maps and photographs relating to the changes human physiology undergoes at altitude, including changes in circulation rate, pulse and the nature of red corpuscles. This book will be of value to anyone with an interest in the history of medicine or in haematology.