188 Prof. S. Ringer and Mr. A. P. Stuart on the 



This chart indicates that the temperature does not remain at about the 

 same degree throughout the day and night, but shows that a considerable 

 diurnal variation occurs. The temperature reaches its highest point at 

 about 9 a.m., and continues much the same during the chief part of the 

 day ; while in the evening it uniformly and greatly falls and remains at 

 its lowest depression during several hours of the night; but subse- 

 quently, in the early morning hours, it again uniformly and quickly rises. 

 This diurnal rise and fall constitutes the only great variations. 



We now pass on to speak first of the observations, continued hourlv 

 without any intermission throughout the day and night, made on two 

 lads, named respectively Alfred Mountain and Alfred Run dell. By 

 adopting this plan we shall learn what conclusions we may safely draw 

 from those less complete observations which were discontinued at 

 12 P.M. 



Alfred Mountain was twelve years of age, of a robust build, well 

 nourished and hearty. He had a patch of tinea decalvans, with which 

 exception he was in perfect health. 



The other lad, Alfred Rundell, thirteen years old, was of a rather 

 delicate constitution, but he had a good appetite and was in his accus- 

 tomed health. 



To render our statement the more clear, and to enable our readers to 

 judge for themselves of the correctness of the conclusions arrived at, we 

 have thrown all the results of the observations into the form of Tables, 

 but the details are recorded at the end of this section t. 



In the first column of the following Table is given the name of the 

 boy ; in the second the time the observation lasted ; in the third the 

 maximum temperature of the day; in the fourth the amount of diurnal 

 variation ; in the fifth the hour when the evening fall began ; and in the 

 sixth column the hour of the commencement of the morning rise. 



Name. 



Time of 

 Observation. 



Maximum 

 Daily 



Tempera- 

 ture. 



Amount of 



Diurnal 

 Variation. 



Evening 

 Fall 

 begun. 



Morning 

 Eise 

 begun. 



Eundell 



10 A.M. tO 9 A.M. 



99-2 



2-2 



6 P.M. 



3 a.m. 



Mountain 



*9 



„ » 9 „ 



99-2 



22 



6 „ 



3 „ 





*9 



„ » 9 „ 



99-4 



2-4 



6 „ 



7 „ 





*9 



„ „ 9 „ 



„ „ 8.15 p.m. 



99-4 



2-2 



6 „ 



5 „ 





*9 



99-4 



2-2 



5 „ 







9 



,, „ 9 a.m. 



98-8 



2-8 



2 „ 



4 » 





9 



» „ 9 „ 



99-2 



2-2 



4 „ 



3 „ 





9 



„ „ 9 „ 



98-6 



16 



4 „ 



4 „ 



This Table shows the results of observations made hourly during both 

 night and day, for eight days. On the four days denoted by an asterisk 

 the temperature was taken continuously ; thus the observations were 

 t Tbe Charts are deposited for reference in the Archives. 



