Eighth Pair of Nerves. 65 



would not eat. A little before twelve o'clock, it took a bit of 

 parsley and died immediately afterwards, having survived the 

 operation forty-four hours. The stomach was much larger than 

 usual. It contained some flatus. The food in the stomach did not 

 diflPer much from the masticated parsley found in the stomach 

 of a rabbit soon after a meal, except that the colour was 

 browner. In some parts, however, partial digestion had taken 

 place. Immediately above the cardia, the oesophagus contained 

 some masticated parsley, but there was none higher up. The 

 contents of the stomach had quite the smell of parsley. The 

 duodenum was filled with food, which had passed from the 

 Stomach undigested. The contents of the stomach weighed 

 four ounces. 



The trachea and bronchia contained mucus, though not 

 nearly so much as when both nerves are divided ; and the 

 membrane lining these tubes was red. The lungs collapsed 

 when the thorax was opened. There were several dark- 

 coloured patches on the lungs. 



Experiment 8. 



I kept a dog without food for forty hours, and then gave 

 him seven ounces of chopped beef. The nerve of the eighth 

 pair was then divided on each side of the neck. Food was 

 offered him soon after the operation, but he refused to eat, and 

 appeared uneasy. In twenty minutes he made ineffectual 

 efforts to vomit. In half an hour he was very restless, and 

 continued so for an hour, when he became quieter, but had a 

 slight tremor. In three hours after the operation, the trembling 

 'was much more severe, and the breathing also became dis- 

 tressed. At the end of four hours the animal was killed. 



The stomach was found much distended. I'he food con- 

 tained in it, which resembled boiled meat, weighed nine ounces. 

 Some mucus was also found. The duodenum also contained 

 some mucus, but no chyme. The gall-bladder was dis- 

 tended. 



Experiment 9. 



I divided the nerve of the eighth pair in a dog, on each side 



