Today's installment concludes Blood Circulation Discovered,our selection by Thomas H. Huxley.If you have journeyed through all of the

It is in conceiving the motion of the blood, as a whole, to be circular and in ascribing that circular motion simply and solely to the contractions of

Galen's great service was the proof that the arteries are as much full of blood during life as the veins are and that the left cavity of the heart,