Valves of the heart, 112 of the veins, 117 Vapor, Animal, in breath, 132 Vegetable food, 71 Vegetative functions, 148 Veins, 117 Valves of, 117 Venous blood, 135 Changes of, in respiration, 133 Ventilation, 142 Ventricles of the larynx, 229 of the heart, 110 Ventriloquism, 235 {270} Vertebrae, 21 Vestibule of the internal ear, 223 Villi of the intestines, 96 Absorption by, 96 Vital knot, 171 Vitreous humor, 210 Vocal cords, 126, 230 Observation of, with laryngoscope, 231 Voice, 227 Organ of, 228 Production of, 232 Varieties of, 233 W. Water, 74 Action of, on lead, 75 Chemically pure, 74 Croton, 74 exhaled with the breath, 132 from springs and wells, 74 Proportion of, in the blood 55 " of, in the tissues and fluids of the body, 54 Ridgewood, 74 Walking, as a means of exercise, 31 White corpuscles of the blood, 104 Wisdom teeth, 84 * * * * * Changes made to printed original Page 45, Sect. 12. "(4, Fig. 14)": '(4, Fig. 13)' in original. Page 20, Sect. 20, note. "philosophy": 'philosphy' in original. Page 101, heading. "Sphygmograph": 'Spygmograph' in original. So also in Table of Contents, but cf. p. 116 and Index. Page 144, Sect. 46, note. "zoologists": 'zooligsts' in original. Page 199, Sect. 53. "considerable": 'considera-ale' (on line break) in original. Page 255, s.v. Convolutions. "external": 'extenal' in original.