
Ne EW Pyoae gibi aig EXPERIMENT Station. 159 
neutral fat be treated with pancreatic juice, especially at the 
_ body-temperature, the emulsion which is formed speedily takes 
on an acid recreation, and by appropriate means not only the 
corresponding fatty acids but glycerine may be obtained from 
- the mixture. When alkali is present, the fatty acids thus set 
_ free form their corresponding soaps. Pancreatic juice contains 
_ fats, and is consequently apt after collection to have its alka- 
_ linity reduced; and an aqueous infusion of a pancreatic gland 
: very speedily becomes acid. 
Succus entericus is a secretion in the small intestines. It is 
_ said to convert starch into sugar, and proteids into peptones (the 
action being very similar to that of pancreatic juice ), to split up 
F neutral fats, to emulsify fats and to curdle milk. It is also said 
a to convert rapidly cane-sugar into grape-sugar, and by a fermen- 
_ tative action to convert cane-sugar into lactic acid, and this 
= again into butyric acid with the evolution of carbonic acid and 
free hydrogen. According to the above results succus entericus 
is to be regarded as an important secretion acting on all kinds of 
_ food. But even at best its actions are slow and feeble. More- 
| over many observers have obtained negative results, so that 
_ the various statements are conflicting. Besides we have no exact 
_ knowledge as the amount to which such a secretion takes place 
' under normal circumstances in the living body. We may there- 
_ fore conclude that at present at all events, we have no satisfac- 
_ tory reasons for supposing that the actual digestion of food in 
ee the intestine is, to any great extent, aided by such a juice. 














‘I. Proteids. I. pes: III. Carbohydrates (Sugar and 
| Starches). 
__ I. Proteids. The saliva has little or no action upon proteids, 
_ but serves principally to moisten them and also to render them 
alkaline, or at least to oe their acidity before entering the 
F tomach. 
__ The p os upon entering the stomach are acted upon by the 


a When the Se is complete, the cee form is es 
