Sacral autonomic division: functions of, in mechanisms for emptying, 32-34; activities of, suppressed by activities of sympathetic division, 270-272. Saliva: psychic secretion of, 6; importance of, for taste, 6; flow of, inhibited by excitement, 9. Salivary glands: innervation of, by cranial autonomic, 31. “Second wind”: explanation of, 210. Sex: instinct of, suppressed by fear and anger, 271. “Sham feeding,” 5. Splanchnic nerves: stimulation of, causes adrenal secretion, 41-43; method of stimulating, 87-88; stimulation of, improves contraction of fatigued muscle, 89; stimulation of, hastens coagulation of blood, 162-167, but not in absence of adrenal glands, 167-171; severance of, stops rapid coagulation following excitement, 180-182; eating after severance of, 240. Sports: relation of excitement and power in, 219-221, 296; as physical substitutes for warfare, 297-301; moral values of, 300. Stomach: psychic tonus of, 13; contractions of, inhibited by excitement, 14-15, 17, and by pain, 19; innervated by sympathetic neurones, 27, and by cranial autonomic, 31; reference of hunger sensation to, 245-247; emptiness of, not the cause of hunger, 248; contractions of, when empty, 251-253; method of recording contractions of, 255-256; contractions of, when empty, associated with hunger sensations, 256-259; function of contractions of empty, 263-264. Strength: feats of, related to great emotion, 217-218, 229. Sugar: in blood, 66, 73; in urine, 69-76; relation of adrenal glands to, in blood, 77; increase of, in blood, does not hasten clotting, 159, 170; utility of, when increased in blood, 188-193; a source of muscular energy, 191-193; a means of increasing muscular efficiency, 192-193; use of, in body, not checked by adrenin, 197-199. Swallowing: inhibits hunger sensation, 254. Sweating: value of, in emotion and pain, 203. “Sympathetic” autonomic division: extensive distribution of neurones of, 26; arranged for diffuse action, 28; antagonistic to cranial and sacral divisions, 34-36; active in pain and strong emotion, 36; emotions expressed in, opposed to those expressed in cranial and sacral divisions, 268-272; dominance of, temporary, 273. Threshold stimulus: as measure of irritability, 111; method of determining, 111-114; increased in fatigue, 114-117, 120; when increased, slowly restored by rest, 117-118, and quickly restored by adrenin, 119-123. Trial by battle: feats of endurance in, 226. Vagus nerves: severance of, does not abolish appetite, 240-241, and does not abolish hunger contractions of the stomach, 261. Viscera: similar changes in, in various strong emotions, 275-279; changes in, not distinctive for emotions, 280-281. Vomiting: in consequence of pain, 19.