CONTENTS. Xlll 



PAGE 



SECT. 5. THE FAT-DECOMPOSING ENZYME 210 



Tne Kesearches of Claude Bernard 210 



The Pancreatic Juice decomposes the Neutral Fats . . . .212 



Hypothesis of a Ferment which decomposes Fats .... 214 



SECT. 6. THE PROTEOLYTIC ENZYME TRYPSIN 216 



Historical notes on the discovery of the property of the Pancreatic 



Juice to dissolve and digest Proteids ...... 216 



The Researches of Heidenhain 218 



The Zymogen of Trypsin 219 



Trypsin 220 



SECT. 7. THE CONDITIONS NECESSARY FOR, AND THE PRIMARY PRODUCTS OF 



TRYPSIN-PROTEOLYSIS 222 



The General Phenomena of Proteolysis by Trypsin .... 223 



SECT. 8. ANTI-PEPTONE RESULTING FROM THE ACTION OF TRYPSIN . . . 226 

 Reactions of Peptones free from albumoses and purified by phospho- 



tungstic acid 228 



SECT. 9. ENUMERATION OF THE PRODUCTS (OTHER THAN ALBUMOSES AND PEP- 

 TONES) OF THE ACTION OF TRYPSIN UPON THE ALBUMINOUS BODIES 229 

 General Observations 229 



SECT. 10. THE AMIDO-ACIDS RESULTING FROM THE ACTION OF TRYPSIN ON THE 



ALBUMINOUS BODIES 231 



Leucine 232 



Amido-valerianic acid 244 



Tyrosine 244 



Aspartic Acid 251 



GlutamicAcid 252 



SECT. 11. BASES RESULTING FROM THE DECOMPOSITION OF ALBUMINOUS SUB- 

 STANCES BY TRYPSIN 254 



1. Lysine . 254 



2. Lysatinine 256 



Ammonia 260 



Are Xanthine-bases products of digestion by Trypsin? . . . 261 



Tryptophan 263 



OF THE 



CHAPTER iv.( UNIVERSITY 



V ^ OF J 



THE BILE. 



INTRODUCTORY OBSERVATIONS 266 



SECT. 1. METHODS OF OBTAINING BILE 267 



SECT. 2. THE SECRETION OF BILE, THE CIRCUMSTANCES UNDER WHICH IT OCCURS, 



AND THE CONDITIONS WHICH INFLUENCE IT 269 



Absolute Amount of Bile secreted 269 



Influence of Abstinence on the Flow cf Bile and Variation in its 



Amount during the period of Digestion 276 



