IQ J. Lindhard. 



The temperature is repeatedly higher than what is generally 

 considered the "normal". As the temperature varies, however, with 

 the intensity of the metabolism, there is hardly anything remarkable 

 about these figures. And if by fever is meant a pathological not 

 a physiological condition, it is quite a mistake to call such temper- 

 ature febrile Ч In this connection it may be mentioned that Hill 

 & Flack' have measured temperatures of up to 105° F. in English 

 sportsmen after fatiguing exercise. 



The rise of the temperature is naturally not unlimited. The 

 limit occurs on the appearance of fatigue. The rise is therefore 

 often greater after a short, intense exertion than after protracted 

 toil ; on beginning very energetically so that fatigue appears before 

 the work is finished, the temperature will sink in spite of all. The 

 stronger the muscular development is, therefore, and the longer one 

 is able to keep on working energetically, the higher the temperature 

 will rise, the conditions otherwise being the same. 



The temperature heightened by muscular work and especiall}'^ 

 that raised comparatively highly and suddenly by forced work, falls 

 again very sharply and suddenly, especially if the transition to rest 

 is abrupt; I have seen the temperature fall 1° during 10 minutes; 

 but, as a rule, the reduction takes somewhat longer. 



Time Rectal temperature 



This fall of temperature, not to be stopped by anything else 

 but renewed, vigorous exertion of the muscles, must be assumed 

 to be due to a deficient regulation of heat. It is only gradually- 

 that one becomes adjusted to a maximum output of heat, with 

 consequently the sharp rise in temperature; but when this adjust- 

 ment is once reached, it lasts even after the production of heat 



^ In "Sechste Versammlung der Tuberkuloseärzte Deutschlands" (Zeitschrift f. 

 ärztliche Fortbildung. VI. Jahrg. No. 14, pag. 458—59), Karl Meyer maintains on 

 the basis of 33,000 mouth measurements and 8,000 rectal measurements that 

 every temperature above 37-3° is abnormal. 



'^ Proceedings of the Phj'siological Society, Juh' 20, 1907. 



