CONTENTS. ix 



CHAPTER V. 

 THE NITKOGENOUS DEEIVATIVES OF THE ALBUMINS. 



PAGE 



THE PROTAMINS 69 



THE PROTONS 71 



THE HEXON BASES 71 



Arginin 72 



Lysin 73 



Histidin 74 



THE NUCLEINIC ACIDS 74 



THE NUCLEINIC BASES 77 



THE UREIDS 81 



Uric acid 82 



THE KREATINS 84 



THE AMIDO-ACIDS 85 



THE PTOMAINS . 91 



THE ORGANIC NON-NITROGENOUS ACIDS 93 



CHAPTER VI. 

 THE FERMENTS. 



-General properties 101 



'Chemical composition and general reactions 103 



Mode of action 104 



Classification 104 



The proteolytic ferments 105 



The arnylolytic ferments 105 



The inverting ferments 105 



The steatoly tic ferments 105 



The coagulating ferments 105 



The ferments which decompose urea 105 



The ferments which decompose the glucosides 105 



The tissue-ferments . 106 



CHAPTER VII. 



THE DIGESTIVE FLUIDS. 



THE SALIVA 108 



General characteristics 108 



Amount 108 



Chemical composition 109 



Ptyalin. 110 



Mucin . 112 



Sulphocyanides . . 113 



Nitrites 113 



Extractives 114 



Mineral Constituents 114 



Oases . 114 



