The Flow Of Blood

Proíessor Mosso, the Italian physiologist, constructed a couoh so arranged that it could be accurately balanced in the middle when the slightest change of weight should make either end incline. A man was laid upon it, balanced in a horizontal position. As he went to sleep his head rose aud his feet sank. As he awoke the opposite occurred, proving that the blood left the head in the one oondition and returned to it in the other.