GASTRIC TESTS. 93 



more than thirty minutes after taking food indicates 

 fermentative action, usually due to a deficiency of hydro- 

 chloric acid. After the same time a failure or excessive 

 amount of hydrochloric acid can be considered pathological. 

 It may be absent in acute or chronic dyspepsia and in 

 chlorosis. It usually is not found, or is present in only 

 small amount, in carcinoma of the stomach. With dilata- 

 tion of the stomach caused by stenosis of the pylorus there 

 is often an hyperacidity, more than 0.4 per cent, of the 

 acid being present. 



Make analyses of specimens of gastric juice furnished 

 by the instructors, handing in written reports on the pres- 

 ence or absence of: 



1. Free hydrochloric acid. 



2. Acid phosphates. 



3. Lactic acid. 



4. Butyric acid. 



5. Pepsin. 



6. Coagulable protein. 



7. Non-coagulable protein. 



Also quantitative determination of: 



8. Free hydrochloric acid. 



9. Combined hydrochloric acid. 



10. Organic acids and acid phosphates. 

 In each case include in the report a full explanation 

 of the results as showing to what degree the juice is nor- 

 mal or pathological. 



THE PANCREATIC JUICE. 



The fluid secreted by the pancreatic gland contains 

 three ferments which aid in the digestion of the food: tryp- 

 sin, which decomposes the nitrogenous constituents; 



