144 PHYSIOLOGY. SECT. XvIT. 
carbon of the blood is viewed, it appears the 
cause of dilating the thorax. 
cccLvul. The irritation of one part often pro- 
duces muscular contraction in organs at a distance 
from it; thus, vomiting arises from tickling the 
fauces, and sneezing from sternutatories applied 
to the nostrils; in these cases, the sympathy is 
more remote than between the pulmonary capil- 
laries and the muscles of inspiration. 
cccLv1t. Physiologists have been much at a 
loss to account for the first inspiration; Haller 
explained it ratherin an odd manner. He says, 
that the foetus being accustomed to swallow the 
liquor amni during gestation, makes an effort to _ 
continue swallowing it after birth; but, in place 
of this fluid, air gets into its mouth, rushes down 
the trachea, and inflates the lungs. 
ccctix. If this extravagant hypothesis came 
from any ordinary individual, it might be left to 
its own absurdity; but, coming from Haller, it 
deserves refutation. 
cccLx. The foetus is not nourished in utero 
by the intestinal canal; for if it were, the liquor 
amni would necessarily be mingled with ex- 
crement. Monsters of various descriptions arrive 
at the maturity of an ordinary foetus, without 
the possibility of swallowing the liquor amni, or 
evacuation by the anus. 

