434 A MANUAL OF PHYSIOLOGY 



lifting up a loop of intestine immediately after opening the abdomen. 

 If the absorption of the fat has begun, they will be easily visible, as 

 a network of fine milk-white vessels. Also examine the gastric and 

 intestinal contents with the microscope for fat globules. Compare 

 your results on the amount of sugar obtained from the three animals. 

 Probably much more unabsorbed sugar will be found in C than in 

 B, as the lard hinders it from being dissolved. 



12. Auto-digestion of the Stomach. In some of the previous 

 experiments the stomach of an animal killed during digestion should 

 be removed from the body after double ligation of resophagus and 

 duodenum, and placed in a water-bath at 40 C. After several 

 hours the contents should be washed out, and the mucous membrane 

 examined. It may be entirely eaten away in parts. 



