ON THE SEASONAL VARIATIONS OF TEMPERATURE. 



465 



Neglecting siga the total changes are 



A comparison of the general means for the whole five months shows 

 the mean effects of day heat and night cold to be : — 



This shows, although only as a rough approximation, the average 

 daily rate of storing heat in the summer months. 



River Deewent (Derbyshire). 

 Observations made at Bel per hij Mr. Wm. Hunter^ 



1891. 



