Abstract
(1) A new method by which the changing volume of the heart can be recorded was devised for continuous observation of the heart as a whole.
(2) The principle on which the method is based was explained and the apparatuses used were described.
(3) The auricular and ventricular contractions in a normal case were accurately traceable by this method.
(4) Extrasystoles in a patient with mitral stenosis and insufficiency were recorded as corresponding abnormal contraction.
(5) Peculiar waves probably indicative of contraction of the major vessels, were recorded from a patient with patent ductus arteriosus.
(6) The experimental and diagnostic significance of this method seems to be nearly settled by the above described informations obtained by it.
(7) More detailed examination of this method and its improvement are being attempted.
