605 



Natural Surfaces. 

 Cheek (boy, immediately after running) - 36*25 



(Anterior surface of forearm - 33'5-34'4 



Posterior ,, - 34-0 



Skin over biceps - - 35*0 

 temperature, ,, head of tibia 31-9 



i7'5 ,, immediately below xiphoid cartilage 34*7 



,, over sternum 33 ' 2 



On hair (boy) - 30*0 

 Under hair over sagittal suture (boy) 33'7-34'o 



Shaved skin of neck (rabbit) - 36*5 



On hair ,, ,, ,, 31*5 



between eyes ,, - 30*7 



Artificial Surfaces. 



(Man) for r j_ , r. i 



Room I Surface * "trousers over thigh - 23'7~28'7 



temperature, 'I coat over arm 



^ o ' [ waistcoat - - 26-0 



Normal Variations in the Temperature. The internal tem- 

 perature, as has been already said, is not strictly constant. It 

 varies with the time of day ; with the taking of food ; with age ; 

 to some extent with violent changes in the external temperature, 

 such as those produced by hot or cold baths ; and possibly with 

 sex. On the average the range of variation in the temperature 

 of the rectum or urine of a healthy man is from 36*0 C. (96*8 F.) 

 to 37*8 C. (100*0 F.). 



In the monkey a very distinct and constant diurnal variation 

 has been observed, and the range is much wider than in man, 

 (as much as 5-4 F.), the maximum falling between 6 and 8 p.m. 

 and the minimum between 2 and 4 a.m. (Simpson). 



The daily curve of temperature shows a minimum in the early 

 morning, between two and six o'clock (36*3 C.), and a maximum 

 in the evening, between five and eight o'clock (37*5 C.) (Fig. 200). 

 The daily range in health may be taken as a little over 

 i C., or about 2 F. In fever it is generally greater, but the 



