THE JUICES POURED OUT UPON THE FOOD 73 



The latter consist of: 



Mucin and pigments 5.290 4.290 5.150 



Taurocholate salts 3 . 034 2 . 079 2 . 180 



Glycocholate salts 6 . 276 16 . 161 6 . 860 



Fatty acids from soaps. ... 1 . 230 1 . 360 1 . 010 



Cholesterin 0.630 1 .600 1 .500 



Lecithin 1 JO. 475 0.650 



Fat / ' 10.956 610 



Soluble mineral salts 8 . 070 6 . 760 7 . 250 



Insoluble mineral salts . 250 . 490 0.210 



The functions of the bile and the regulation of the biliary 

 flow can be better discussed elsewhere. 1 



5. The Intestinal Juice. Under this heading are grouped 

 all the secretions of the intestine proper from the pylorus 

 of the stomach to the anus. The intestinal juice has been 

 obtained in man from cases of intestinal fistula ; from animals 

 it is obtained experimentally and unmixed with other diges- 

 tive secretions or food by the production of either a THIRY 

 or a VELLA fistula in any desired portion of the small or large 

 intestine. 2 



The pure juice obtained from different portions of the 

 intestinal canal below the stomach varies not only in amount 

 but also in composition. We shall first consider the secre- 

 tion of the small intestine (succus entericus) . ROHMANN 3 

 describes the juice of the small intestine of the dog as scanty 

 in amount, viscid, and somewhat gelatinous in the upper 

 portions, and as larger in amount and more fluid in the lower 

 portions. THIRY 4 obtained a maximum secretion of 4 c.c- 

 per hour from a loop of small intestine having a total sur- 

 face of 30 sq. cm. The specific gravity is given by the 

 same author as 1.0115, and the juice is described as clear, 

 light yellow, somewhat opalescent, and of a decided alka- 

 line reaction. The juice from the small intestine contains 



1 See Chapter XIII, Parts 1 and 2. 



2 See Chapter XIII, Part 3. 



8 ROHMANN , Pfliiger's Archiv, 1887, XL1, p. 424. 

 4 THIRY. Vierordt's Tabellen, Jena, 1888, p. 140. 



