230 "Joiirnal oj Comparative Neurology ami Psychology. 



noted that this temperature was ''just warm," "only slightly warm," 

 etc., not so warm a sensation as that given by the stimulus in the 

 areas D and E. Likewise with a stimulus of 60° C. The area in 

 which warm sensations were obtained were B and C, but the sensa- 

 tions from area B were not so intensive as tliose in area C. This 

 temperature was felt in areas D and E always as hot. 



The parts of the arm which did not retain their ability to appre- 

 ciate pressures, area below G in Fig. 4, and area A in Fig. 5, did not 

 respond at any time to any, temperature stimulus. Areas G, F, E 

 and D in Fig. 4 and area B and C in. Fig. 5 may be said to have 

 retained the protopathic sensibility in addition to the deep . sensi- 

 bility, and in these areas hot stimuli were felt to be only warm, 

 while cold stimuli w^ere felt to 1)0 only cool. In the upper forearm 

 area D-G there was no response, as a rule, to the intermediate 

 degrees of temperature. The remainder of the area A-C responded 

 accurately to all degrees of temperature stimuli. In the area near 

 the wrist, only D and E reacted well to all degrees of temperature, 

 and showed the presence of epicritic sensibility. Areas B and C 

 failed to respond to medium degrees of temperature and their response 

 to the extremes was not well marked. 



At different times during the examination of these two arm areas, 

 the following experiment was tried : The test tube, instead of being 

 placed with its end on the skin, was placed so that three to four 

 centimeters of its length extended over the horizontal areas which 

 gave such widely different results. In these experiments the subject 

 described the sensations which were produced and the accounts are 

 in accord with the observations made when the small horizontal 

 areas were stimulated by the end of the test tube. ITear the wrist 

 when cold, ■ — 5° C, w^as used, the subject reported that toward the 

 radius the sensation was of extreme cold, but near the axis of the arm 

 the sensation w^as only cool. In a similar way the sensation from 

 60° C. was described as hot near the radius and warm near the 

 axis of the wrist. The places from which respectively cool and 

 wann sensations w^ere obtained when cold and hot stimuli were given 

 were pointed to by the subject and they correspond closely to the 

 area C. This area it will be rememibered was found by the previous 



