_Pulmonary Circulation_ speculation as to its use, 48 follows from continual passage of blood from right ventricle to lungs, and from lungs to left ventricle, 54 course of, shown in body of a man recently hanged, 177 _Pulmonary Veins_ ancient views regarding their function, 17 _Pulse_ caused by contraction of the ventricle, 29 due to the impulse or shock of the blood, 30 Aristotle on the, 30 found in all parts of the body, 121 not inherent in walls of arteries, 135 in an artery beyond an aneurism, 135 in an artery beyond an ossified portion, 137 illustrated by experiment with dried intestine of a dog, 152 cause of, in arteries near the heart, 163 R _Rabies_ how confirmatory of the circulation, 90 _Riolan, John, Jun._ controversy with Harvey, xix quoted on the movements of the heart, 31 Harvey’s First Disquisition addressed to, 109 presented a copy of his work to Harvey, 111 his views on the circulation, 113 denies the mesenteric circulation, 115 favoured view that septum of heart is permeable, 123 Harvey’s Second Disquisition to, 131 S _Scarborough, Dr._ a friend to whom Harvey left his surgical instruments, 216 and his velvet gown, 218 directed by Harvey’s will to present to College of Physicians his books and collections, 216 _Science_ dependent on pre-existing knowledge of more obvious things, 160 _Semilunar Valves_ references to, 16, 45 Galen aware of their use, 51 function to prevent regurgitation, 116, 153 _Senses_ facts cognisable by, wait on no opinion, 150 importance of appealing to the, 158, 159 Aristotle on trusting to the, 160 _Septum of the Heart_ Cæsalpinus thought it permeable, xii Harvey on the view that it is porous, 19, 20 Riolan believed it porous, 123 _Servetus, Michael_ gave a description of the pulmonary circulation, x curious history of his work containing it, xi _Shrimp_ movements of the heart of a, 36 _Sigmoid Valves_ See _Semilunar_ _Silvius, Jacobus_ discovered the valves of the veins according to Riolan, 78 _Simon, Sir John_ on Harvey’s discovery, ix _Slegel, P. M._ letter of Harvey to, 176 _Snake_ observations of heart and bloodvessels of a live, 65 _Spirits_ views of the ancients regarding, ix arteries supposed to contain, by Erasistratus, 140 the common subterfuge of ignorance, 141 three kinds of, admitted by the medical schools, 141 not distinct from the blood, 143, 146 _Spleen_ bloodvessels connected with the, 94 vein of, has a valve, 116 _Systole and Diastole_ of arteries as of heart, 138 constitute the pulse, 163 observations on, 170 T _Transmission of Disease_ discussed, 193 _Tricuspid Valve_ referred to, 16, 101, 153 U _Umbilical Vein_ function of, 118 V