THE RATE OF THE CIRCULATION OF THE BLOOD IN NORMAL RESTING INDIVIDUALS *

Abstract

This paper describes two allied methods for the determination of the rate of blood flow which have yielded consistently reproducible results in untrained subjects. The data obtained in forty experiments on twenty-one normal resting individuals are presented in tabular form. The first method is suitable for use with subjects having prac- tically any type of pathology but in the resting condition only. The second method is inapplicable when the subject has a pulmonary le- sion preventing ventilation of part of the alveoli or a cardiac defect permitting mixture of arterial and venous blood. With these restric- tions, however, this method should be useful as it can be carried out in a short time, with a high degree of accuracy and under varying conditions of activity.