1) AGTH, cortisone and thyroid hormone were intramuscularly injected in those three groups of cats, which were investigated as stated in Part I. 2) In normal cats, these hormones had almost no influence. 3) In the group injected before producing brain edema, ACTH and cortisone considerably depressed the progress of the brain edema, while thyroid hormone had no influence. 4) In the group injected after producing brain edema, ACTH and cortisone slightly depressed the progress of the brain edema. But thyroid hormone had no influence. 5) The change of water content mainly consisted in free water. and total water. Bound water remained almost unchanged.