_Descartes_ supports Harvey’s discovery, xvii Harvey makes his acknowledgments to, 169 his observations of the heart of a fish, 169 his explanation of the pulse not accepted by Harvey, 170 _Diastole and Systole_ of arteries as of the heart, 138 constituting the pulse, 163 _Dissection_ uses of, 112 failed to reveal any of the “spirits” of the schoolmen, 141 _Diuretic_ drinks, their quick action in illustration of the large quantity of blood circulating, 49 _Ductus arteriosus_ shrinks gradually after birth, 45 its function in the fœtus, 98 E _Eel_ observations on the heart of the, 33 _Embryology_ Harvey a pioneer in the science of, xx _Ent, Dr. George_ persuaded Harvey to publish his treatise on Generation, xx directed in Harvey’s will to present his books and collections to the College of Physicians, 216 Harvey left him his presses and shelves, 216 _Epigenesis_ Harvey’s doctrine of, xxi _Erasistratus_ thought the arteries contained only spirits or air, 40, 140 _Euripus_ the tides of, the motion of the heart as perplexing as, 22 Galen refers to, in speaking of the use of the semilunar valves, 53 Riolan applies, to the movement of the blood in the mesenteric vessels, 115 _Experience_ importance of, for scientific observation, 160 _Experiment_ the direct appeal to, viii Galen’s, to show arteries contain only blood, 12 Galen’s, to show arteries filled like bellows, controverted by Harvey, 14 of arteriotomy, 14, 28, 29 Galen’s, of dividing the trachea, 18 to observe the beating heart, 24 of dividing the gill vessels of fishes, 28 on the hearts of an eel, a fish, and a pigeon, 33 to show the capacity of the left ventricle, 59 on the heart of a snake, 65 of tying the veins below the heart in serpents and fishes, 65 on a man’s arm with a bandage, 68 on the veins of the arm by ligatures, 82, 84 of tying the vena cava near the heart and dividing carotid artery, 129 Galen’s, on an artery, 134 performed and disproved by Harvey, 135 on an exposed undivided artery, 136 to show the blood of arteries and veins the same, 138 to show the different character of outflow of blood from artery and vein, 147 to show blood cannot pass from heart by the veins, 147 with the dried intestine of a dog filled with water to illustrate the pulse, 152 on the jugular vein of a fallow deer, 153 by appeal to, endeavour to demonstrate circulation, 163 of dividing exposed artery to observe effect on pulse, 163 of tying the pulmonary veins, 165 of bandaging arm and plunging it into cold water, 168 of tying the vena portae, 171 of tying the vena cava near the crural veins, 172 on the body of a man recently hanged, to show course of blood through lungs, 177 F