Nyt Mag. for Naturv. Bd. 39 . 



PI. 9 



10 20 ."»O. to 50 60 'O 80 90 



160 Naut Mlles 



«o 60 80 



300 Kiloiriftres 



i9-i-oc Zåi-oo 



57 Si 



m 





Section lY. 



Vertical Distances 1000 tim p.S magnified 



in proportion to Horizontol Distances. 



460 

 480 



Scale o-F Hopizonta) Distance = l-.'tOOOOOO ^^ 



— 480 



;; M Vertical 



= 1:^00 



