Franz, Sensations Folloiving Nerve Division. 



227 



to keep the temperature of the test tubes constant beyond that of 

 having them cold, cool, warm or hot to corresponding parts of a 

 normal individnal, but temperature degrees were always noted and 

 records made at the tinw?. In Fig. 4 is shown the area on the upper 



2*-lO*C. 



ia*-22*C. 



.■■ f . .i 



30- ■40*0. •V5*-60*C. 



Fig. 4. 

 Fig. 4. — lUustraliug tlie seusatious accompauying temperature stimuli 011 

 tlie upper volar part of the forearm. Each of the four parts of the figure 

 represents the same area of skin. The lowest line is the extent of the loss 

 of pressure sensations. The line above area D separates, but not so sharply 

 on the skin, the area of epicritic sensibility (A, B and C), from that of pro- 

 topathic sensibility (D, E, F and G). Vertical lines, sensations of warmth. 

 Horizontal lines, sensations of hotness. Diagonal lines running from top to 

 the right, sensations of coldness. Diagonal lines running from the top to 

 the left, sensations of coolness. 



part of the foreann divided into its component square centimeters 

 with the results from each kind of temperature stimulation. 



In only two cases, with very cold stimuli, 2°-10° C, did the 

 three answers differ and in both cases, once each in the two 



