1 



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



Name. 



Temperature 

 taken from 



Temp, 

 rose. 



Rose 

 per 

 hour. 



Temperature 

 taken from 



Rise. 



Rise 

 per 

 hour. 



Breakfast. 



Mountain 

 Eundell . . . 



3 a.m. to 6 A.M. 

 3 „ „ 6 „ 

 2 „ „ 6 „ 



2 „ „ 6 „ 



3 „ „ 6 „ 



1 » M 6 „ 



3 6 



2 „ „ 6 „ 



4 „ „ 6 „ 



2 „ „ 6 „ 

 4 » » 6 „• 



3 „ „ 6 „ 

 2 „ „ 6 „ 



oF. 

 10 

 10 



1- 2 



10 



2- 

 12 

 0-8 

 14 



0- 8 



10 



04 



1- 2 

 1-2 



033 

 033 

 03 



0-25 

 0-66 

 024 

 0-26 

 0-35 

 04 



025 

 0-2 

 0-4 

 0-3 



6 A.M. to 9 A.M. 



Ditto. 

 >> 



6 „ „ 8 „ 

 6 „ „ 9 „ 

 Ditto. 



>j 

 jj 



>> 



>j 



F. 

 0-6 

 06 

 04 



0-8 

 06 

 06 

 1 



0- 6 



1- 6 



1 



10 



0-4 

 0-8 



o 



0-21 

 0-2 f 

 013 



04 



0-2 



0-2 



033 



0-2 



053 



0-33 

 033 

 0-13 

 026 



Tea with little milk in it. 



Breakfast-cup of cocoa, & 

 \ round of bread & butter. 

 Cup of cocoa. 

 » 



J) 



^ pint of milk, ^ round 



of bread. 

 Cup of cocoa. 



5 J 



ft) 



^ pint of milk, ^ round o f 

 bread and butter. 





0-328 





0-264 





To what extent was the elevation following breakfast due to that meal ? 

 Probably to a very small extent ; for : — 



1st. The rise after breakfast was somewhat less than the rise before it, 

 the Table showing that the average hourly rise of all the observations 

 before breakfast was o, 328 Eahr., while the hourly average rise after 

 this meal was o, 264 Fahr. It thus appears that, apart from food, the 

 causes which influence the diurnal variation are adequate to explain the 

 rise which happened after breakfast. 



2nd. The rise after breakfast if due to food should be in proportion to 

 the quantity taken; but no such relation occurred. The rise, as the 

 Table shows, was somewhat greater after a cupful of very weak tepid 

 tea than after a fairly hearty meal. 



3rd. On the morning when these boys took only a cupful of tea, they 

 may be considered to have practically gone without breakfast ; yet on 

 these days the rise took place as usual, showing that the greater part of 

 the after breakfast rise, and in all likelihood the rise on other days, must 

 be independent of food. 



Still restricting our attention to the observations on Mountain and 

 Rundell, we pass on to consider how far the evening fall in the tempera- 

 ture is affected by the evening meal. 



These boys took tea at 5 p.m., always a very hearty meal, often the 

 largest of the day, and generally consisting of two, often of three 

 eggs, bread and butter, with tea or cocoa. They had no supper, and were 

 allowed to fall asleep at their pleasure, and were not awakened when the 

 temperature was read off. Due care was taken that they were well 

 covered with bed-clothes. 



In sixteen observations the temperature after tea fell immediately and 



