464 



On the Temperature of the Head. [June 20, 



Alterations in the same direction, but less common and less marked, 

 may also occur in the middle and posterior regions. 



(&.) Emotional Activity. 



The following results have been obtained by the recitation of poetry 

 or prose of an emotional character : — 



1st. Emotional activity, of the kind specified, causes a rise of tem- 

 perature in all three regions ; this rise is, moreover, more rapid and of 

 greater degree than that seen in intellectual work. 



2nd. Less difference exists between different regions in the rapidity 

 and degree of rise of temperature in emotional activity than in intel- 

 lectual work ; but the order of the regions, as regards their compara- 

 tive degrees of rise of temperature, is usually the same in the two 

 cases. The average rise of temperature for each region is as follows : — 

 Anterior region, 0-036° C. (0-0648° F.) ; middle region, 0-0345° C. 

 (0-0621° F.) ; posterior region, 0"033° C. (0-0594° F.) Recitation to 

 oneself produces, as a rule, a greater effect than recitation aloud. 

 This result is in accordance with physical laws, a portion of the heat 

 produced being, in recitation aloud, consumed in exterior work. 



3rd. In emotional activity, as in intellectual work, the left side of 

 the head is generally more affected than the right side. The average 

 percentages of times of occurrence of greater rise of temperature on 

 the left side and on the right side, and of equal rise on the two sides, 

 together with the mean difference of rise in favour of each side, are as 

 follow: — 



Anterior Begion. 



Left side. Bight side. Equality. 



Average percentage of 



77-5 .. 17-5 .. 5 



cases m favour oi . 



} 



Average difference of 1 0-0075° C. .. 0-00573° C. 



rise of temperature / (0-0135° F.) . . (0-01035° F.) 



Middle Begion. 



Leftside. Bight side. Equality. 



Average percentage of 1 g 9 .g 20 17*5 



cases in favour of . . J 



Average difference of 7 0-00562° C. . . 0'00462° C. 



rise hi temperature / (0-0116° F.) . . (0-00831° F.) 



-Posterior Begion. 



Left side. Bight side. Equality. 



Average percentage of 1 ^ 20 25 



cases in favour of . . J 



Average difference ofl 0'00437° C. .. 0'00387° C. 



rise of temperature J (0-00786° F.) .. (0'00696° F.) 



