Abstract
1. In winter the blood pressure of A. centralis retinae rises by undressing but in summer no change could he found.
2. The influence of the warm bath on the blood pressure of A. centralis retinae could be divided into 3 stages. There is a sudden rise just after the body is ex- posed in the warm bath followed by decends for a while and rise again at the end of the bath. The blood pressure of A, centralis retinae is higher by the crouching posture during bath than that of the sitting posture. The higher the water temperature the higher is the blood pressure and in winter the initial ascend rate of the blood pressure is larger than that in summer but in summer the ter-minal ascend rate is larger than that in winter.
3. After bath the blood pressure descends to the initial blood pressure for a while then it gradually recovers to the normal pressure.
4. The rising degree of the blood pressure of A. centralis retinae during bath in the cases with high blood pressure were higher than that in the healthy cases. By the results obtained by these experiments it can be concluded that the fol-lowing cares are necessary in order to prevent the attack of cerebral hemorrhage by taking a warm bath.
1) In winter the cold body must not be exposed to the hot water suddenly.
2) A long hot bath is contraindicated in summer.
3) A hot bath is contraindicated to those with high blood pressure.
4) The Japanese bath tub must be changed as it causes the marked. rise of the blood pressure in the cranium.
