TACTILE PERCEPTIONS. 



by putting into C somewhat more of the warm 

 water than into D, so that its contents are 

 finally the warmer of the two. Nevertheless, 

 the effect of contrast is so great that C will 

 still be felt to be the colder, even when it is 

 the warmer. 



The effect of the surprise upon the person 

 experimented on may be heightened by using 

 one long dish or other vessel instead of the two 

 basins C and D, and letting the subject of the 

 experiment have the cover taken from his eyes 

 immediately his hands, removed from the two 

 first basins A and B, have been placed in the 

 one long one. He then sees that the hands, 

 which he had supposed to be in two different 

 vessels containing water of different tempera- 

 tures, are both in one and the same vessel of 

 water. , 



2. Pain in the Foot when the Leg has been 

 amputated. 



To feel pain in a limb which one has no 

 longer got seems absurdly impossible, yet it is 

 a not uncommon experience. 



It may happen in common experience that 

 in a limb which is present we feel a pain which 

 is not really present in the limb. This may 

 easily occur in dreams, for instance, or in 

 hysteria. Hysterical patients frequently suffer 

 from the sensation of pain in parts of the body 



261 



