PART III. KARTH CUKRKNTS AND KARTH MAGNKTISM. CHAP. I. 



TABLE CXXIV (continued). 



Ju = 180 



773 



= 270 



Values of ig in the second extreme case. 



dp = 75 



Jfl = 1 80 



Birkeland. The Norwegian Aurora Polaris Expedition, 1902 1903. 



