1878.] 



the Temperature of the Head. 



463 



elevations of temperature differing from each other both in rapidity of 

 appearance and degree. 



4th. The kind of work which affects one region in the greatest 

 degree affects all three regions most. 



The anterior region shows, as a rule, both, the most rapid and the 

 highest rise of temperature. The middle region comes next and the 

 posterior last. A notable exception to the above order is found, how- 

 ever, in the 1st district (and sometimes the 2nd district) of the 3rd, 

 4th, and 5th tiers of the middle region. In these spaces, the middle 

 region often shows a greater rise of temperature than that exhibited 

 by a considerable part of the anterior region. The average rise of 

 temperature for each region is as follows : — Anterior region, 

 0-02625° C. (0-04725° F.) Middle region, 0'02062° C. (0-03711° F.) 

 Posterior region, 0-01743° C. (0-03137° F.) 



5th. Intellectual work, as a rule, causes a greater rise of tempera- 

 ture on the left side of the head than on the right side : but in a 

 certain number of cases the rise is either greater on the right side or 

 is equal on the two sides. The following are 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 : — 



Anterior Region. 



Left side. Right side. Equality. 



Average percentage of T ^ ^ 15-625 9-375 



cases in favour of . . J 



Average difference of 1 0-00606° C. . .. 0'00295° C. 



rise of temperature J (0-0109° F.) . . (0*00531° F.) 



Middle Region. 



Left side. Right side. Equality. 



Average percentage of | Q ^ ^ 2r875 ^ 15 . 625 



cases in favour of . . j 

 Average difference ofl 0*00496° C. 0*00225° C. 



rise of temperature J (0*00892° F.) (0*0045° F.) 



Posterior Region. 



Left side. Right side. Equality. 



Average percentage of I ^ 15 . 625 2 8-125 



cases m favour of . . J 

 Average difference ofl 0*00231° C. .. 0*00162° 0. 



rise of temperature J (0*00415° F.) „ . (0*00291° F.) 



In some individuals, after severe and prolonged work, or after work 

 of an exciting character, not very prolonged, the rise of temperature 

 on the left side of the head may be sufficient to cause almost the 

 whole of the anterior region to be of higher temperature on this side. 



