480 DIGESTION 



porterhouse steak with onions, potatoes, and a tomato salad." These 

 results are no doubt due to local inhibition dependent upon the psychic 

 secretion of appetite gastric juice. When no such juice is produced, 

 the sight and smell of good food does not appear to affect materially 

 the hunger contractions of the stomach. No doubt it stimulates the 

 appetite, but that, as we have seen, is' a psychic affair. 



