SOME DERMAL SENSATIONS. 129 



I. THE LOCATION OF THE SENSE OF TASTE. 



Place a little sugar on the tip and on the back of the 

 tongue. Where is it sweeter? Repeat with acetic acid 

 or vinegar and salt, and determine where they are more 

 sharply tasted. 



II. THE DIFFERENCE BETWEEN TASTE AND SMELL. 



Close the eyes and nostrils and try to distinguish be- 

 tween salt and pepper, apple and potato. 



Which of the following have taste, and which have 

 odors, onion, sugar, salt, vinegar, carrot, dilute ammo- 

 nia, and cabbage? 



