ARCTOWSKI, CHANGES IN DISTRIBUTION OF TEMPERATURE 63 



pleioniaii curve. The Aachen curve is characterized by brachychronic 

 variations of small amplitude. 



In northwestern Europe, then, the brachypleions must have a pre- 

 dominant importance, whereas they do not affect eastern Europe very 

 greatly. The curves of the Scandinavian stations, on the other hand, 

 belong to a mixed tvpe of pleions and brachypleions. Here we may have 



Fig. 11. — Consecutive temijeratnre curves at Geneva, Aachen, Vestervig, Bodii, 



Haparanda and Sydvaranger 



a succession of several years during which the changes of temperature 

 will be slow and great, as in Russia, followed by a succession of years of 

 shorter and more irregular changes entirely different from those of Russia. 

 It would seem that there are pleionian and brachypleionian areas and 

 that the border between them may temporarily beldng to one area or the 

 other. In reality, however, things are more complicated because the 

 pleionian and brachypleionian variations are coexistent over more or less 

 large areas. The comparison of the curves shows this very plainly. 



