On the study of the physical and chemical properties of the blood remained in the heart of the rabbit which died of the internal bleeding by cutting off the mesentery artery, comparing with Irie's reports in which he examined the properties of the blood remained in the heart of the dead body due to external bleeding by cutting off the carotid artery and internal bleeding by liver injury, the following results were obtained: 1) In this experiment: a) the quantity of bleeding was larger relatively, and the time of death was longer than in Irie's experiments; b) the blood sedimentation rate and the blood coagulation time prolonged like the case of liver injury; c) the blood sugar increased like the case of liver injury; d) the quantity of serum calcium and phosphor increased like the case of liver injury. 2) There were no obvious differences between this experiment cud the experiment of liver injury.