Investigations into tlie conditions governing the temperature of the hod}'. J 1 



case for the last reading, which was taken after standing still in 

 the mess-room. Curve 4 (from measurements in another individual) 

 is better adapted for comparisons; it is a typical curve of varia- 

 tion for a day without bodily work; the temperature was here read 

 in recumbent position. The difference between this and the other 

 curves with regard to the height and situation of the maxima is 

 due to differences in the meal-times and character of the meals. In 

 curve 4 the last meal falls an hour later than in the other curves, 

 and while the meal of 6 p. m. is the main meal in the latter, the 

 main meal in curve 4 was between 12 and 1. 



The greater disagreement between Tigerstedt's curves for CO о 

 and those for temperature is certainly due to the fact, that he 

 employed Jürgensen's "normal curve" for comparison. This curve 

 is an artificial production and therefore hardly fit for concrete 

 instances. 



It would be of interest to compare a series of morning measure- 

 ments with the amount of CO о set free "on an empty stomach". 

 In this respect I can only show the 



results from 5 successive days; for 07 '| ^^ ,g ,g 2o 



my morning experiments I have in 

 most cases only taken the rhouth ^^ 

 temperature, which for reasons not 2'tOcc^ 

 noticed till later is not suited to the 

 comparison mentioned here. ^'^- ^^• 



The two curves do not differ 

 very much, but as both are almost straight and the observations 

 were few in number, their value is naturally rather limited. 



The agreement between the amount of carbonic acid set free 

 and the temperature only holds good for the rectal temperature. 

 For the mouth temperature no connection can be discerned, even 

 in long series of measurements; for this the greatest care must cer- 

 tainly be taken that the outer temperature is always nearly the 

 same. And for my part I could not possibly fulfil this condition. 



Owing to the distinct parallelism between the CO o- curve and 

 that for the rectal temperature, we may expect that the factors 

 which influence the metabolic changes will also find expression in 

 the latter. 



Meal-time and temperature. 



As the work of digestion extends over a long period and pro- 

 ceeds comparatively evenly, it will only to a slight degree tell upon 

 the form of the temperature curve. It is in fact only during the 

 first part of the process, the meal- time, that we can notice any 

 effect. We have seen from the curves already given, that there are 



