Abstract
The author investigated the reaction of circulatory system when large quantity of salt was given to normal rabbits, and showed following results and conclusion: (1) Reabsorption of salt decreases when large quantity of salt is given. (2) In addition to this there are the other two types of reaction which compensated one another, i. e. increase of blood volume and increase of blood velocity: the former goes with increase of blood depot, the latter with decrease of it. (3) when normal rabbits are given salt less than 2g. the former i .e. increase of blood volume predominates and when given more than 4g. the latter does.