x CONTENTS. 



PAGE: 



THE GASTRIC JUICE 114 



General considerations 114 



Amount 114 



Chemical composition 115 



Acidity of the gastric juice 115- 



Determination of the total acidity of the gastric contents 110 



Amount 117 



Hydrochloric acid 117 



Origin 117 



Significance Us 



Tests for hydrochloric acid 119 



Estimation 120 



Lactic acid 122 



Tests. 122 



Estimation 122 



Acetic acid and butyric acid 123 



Tests 123 



Estimation 123 



Quantitative estimation of the organic acids 124 



The ferments of the gastric juice and their pro-enzymes 124 



Pepsin 126- 



Isolation 127 



Estimation 120 



Pepsinogen ' 129* 



Tests 129 



Estimation 130 



Chymosin and chymosinogen 130 



Tests. ..." 131 



Isolation 131 



Estimation 132 



Other constituents of the gastric juice 132 



Gases 132 



THE PANCREATIC JUICE 



General properties 134 



Specific gravity 



Amount 134 



Chemical composition 134 



The ferments and their zymogens 136 



Trypsin 136 



Test 



Isolation ' 138 



The amylolytic ferment 138 



Steapsin 138 



Maltase 



Chymosin 139 



The glucolytic ferment 139 



THE ENTERIC JUICE 



THE BILE 



Secretion 142 



Amount . I 43 



