

Vector Diagrams lor ,,the Average Polar Storm" 



N ^ 



Matnlrfilfiii - 



Kaaftonl 



v~ 



Gr.M.T 



Axelcicw 



Dyra/jurd/ 



Cr.MT. 





Sr.-ilc , 



, , , , 1 . , -, , l 



Fig. 197. 



Birknnd. The Norwegian Aurora Polaris Expedition, 1902 1903. 





