Abstract
The author used dog's blood as the material. He recorded continuously and simply the change of blood coagulation by means of the transmission of pure sound, withoxit giving it any mechanical effect, and could facilitate the analysis of the curve from such obtained photograms as Figure 3, and in consequence contribute to the study concerning the blood coagulability. The outline of this report was read before the Third Meeting of the Japanese Society of Clinical Angio-Cardiology (Twenty Second Sectional Meeting of the Tenth Japanese Medical Congress). The author tenders his cordial thanks to Prof. Toshikazu Mashimo, M. D. for his kind guidance in this study and experiment and to Assist. Prof. Magojiro Maekawa, M. D. for his kind advice.
