282 



SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 70 



between Christiania and Bergen. We have plotted the values thus 

 obtained in figures 100-106. The maxima and minima correspond- 

 ing- to each other in the different curves of the same year are marked 

 with the same letters. Where a maximum has been reversed to a 

 minimum or vice versa, the corresponding letter has a minus. 



The curves marked B and T show that as a rule there is a fairly 

 gcfod agreement between the changes in pressure difference be- 

 tween Christiania and Bergen {B) and the changes in temperature 

 at Bergen (T). In some cases — e. g., in June till middle of July, 



JUNE JULY AUGUST SEITEMBER OCTOBER NOVtM. 



Figure 10 i. 



1908, in October, 1908, about July 24 and November 7, 1909, in 

 the beginning of June and July, 1910 — the curves go, however, in 

 opposite direction to each other. This might naturally be expected, 

 considering that the pressure difference between Christiania and 

 Bergen is not always a measure for the real barometric gradient at 

 Bergen or in Norway as a whole. 



The agreement between the curves 6" for the " solar constant," 

 and the curves B and T for the pressure difference between Chris- 

 tiania and Bergen and for the temperature at Bergen, is not always 

 as striking as we found it in 1915. But it may be noticed that when 

 the curve of the " solar constant " is more trustworthy, being based 

 upon a greater number of good observations, as in 19 15, the agree- 



