Contents xvii 



tion, p. 197. On various asthmatic paroxysms, p. 198. 

 Why respiration is sometimes accompanied by a whistling- 

 sound, p. 198. On hiccup, p. 199. On nightmare, p. 200. 

 How expiration is produced, p. 201. The abdominal 

 muscles contribute, p. 201. How laughter is effected, p. 

 201, On the use of respiration, p. 202. The inspired air 

 does not serve to cool the heart, p. 202. Nor is its sole 

 purpose to transmit the blood through the lungs, p. 203. 

 Nor the comminution of the blood, p. 204. The vital 

 particles of the air seem to be of a nitro-saline character, p. 

 205 ; see Treatise i, Chapter VH., p. 67. On the use of 

 the inspired spirit, p. 205 ; see Treatise i, Chapter VHI., 

 p. 93 ; and Treatise 4, Chapter IV., p. 244. It is shown 

 that there is no ferment in the heart, p. 206. In what life 

 consists, p. 208. The inspired air contributes to animal 

 motion, p. 208 ; see Treatise 4, Chapter IV., p, 244. How 

 that takes place, p. 208. Why suppression of respira- 

 tion causes death, p. 209. Why in violent movements 

 animals breathe more intensely, p. 209. Insects cannot 

 bear want of air, p. 210. 



THIRD TREATISE.— O^ THE RESPIRA- 

 TION OF THE FCETUS IN THE 

 UTERUS AND IN THE EGG. 



How it is that the foetus can live in the uterus without 

 air, p. 211. How the uterine cry and suction in the uterus 

 are produced, p. 212. The nutritious juice of the uterus 

 takes the place of respiration, p. 21 3. The umbihcal arteries 

 are formed for the purpose of respiration, p. 213. They are 

 not destined for the nutrition of the secundines only, p. 213. 

 Nor for the concoction of food, p. 214 Nor do the said 

 arteries bring back from the embryo the cruder portions of 

 the nutritious juice, p. 215. Nor are they made for setting 

 up the circulation of the blood, p. 215. The author's opinion 

 as to their use, p. 216. The nutritious juice of the uterus is 



b 



