Originally published in 1934 as part of the Cambridge Comparative Physiology series, this book examines the key principles underlying animal physiology and the study of physiology. Barcroft shows how every natural internal process is affected and supported by other processes and systems, and concludes every chapter with a brief bibliography on the topics covered. This book will be of value to anyone with an interest in the study of physiology and the functions performed by the organs.

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.

First published in 1925, this two-volume work deals with the blood's role in respiration. This second volume deals with haemoglobin as a chemical substance. The text is illustrated with diagrams and drawings relating to, among other things, haemoglobin's specificity, its manufacture in the body and how it is affected by temperature changes. This book will be of value to anyone with an interest in the history of medicine or in haematology.