176 ANALYTIC SECT. XIX. 
ccccx xxiv. The chynie, after passing the pylorus, 
is submitted to the vital action of the duodenum 
and jejunum, which separates the nutritious from 
the excrementitious part of the alimentary mass ; 
the nutritious part, which is white and liquid, is 
called chyle; the excrementitious part is more 
consistent, and tinged yellow by the bile. 
ccccxxxvV. It is a commonly received opinion, 
that the pancreatic and biliary secretion separate 
the chylous from the feecal matter in the small 
intestines; but there is not one fact corroborative 
of this assertion. It is not a little curious that 
M. Magendie, who is generally very delicate in 
giving way to an hypothesis without fact, should 
have adopted this gratuitous conclusion, without 
even offering an argument in its favour. “ Le mode 
dalteration qu’eprouve le chyme dans [intestin 
gréle est inconnu; on voit bien qu'elle résulte de 
Yaction de la bile, du suc pancreatique, et du fluid 
secrété par la membrane muqueuse sur le chyme.” 
How M. Magendie came to see that chylification 
is caused by the bile, the pancreatic juice, and 
secretion from the mucous membrane, he has 
- given no information. 
eccoxxxvi. The bile is an acrid secretion, which 
supports the irritability of the intestinal tube, 
and enables it to propel the fecal part of the 
aliment; but in a temperature of 98°, Dr. Sillar 
and I have not found it possessed of the least 
