1898-1902. No. 6. 1 



TERRESTRIAL MAGNETISM. 



41 



1900. July 26. Obs. Isachsen. 



L. T. 

 h m 

 9 18 a. m. 

 22 

 28 

 34 

 9 26 a. m. 



L. T. 



9 51 a. m. 



Deflector Distance Needle 

 V E P, 



Deflector Distance Needle 

 VI E P, 



I o p. m. 



Deflector Distance Needle 



V 



Deflector Distance Needle 



VI 



log sin <p 

 r 



colog sin (p„ 

 log Cfi 



log H 



36° 56'-2 



g. 77882 



+ 0.00213 



0.21905 

 8.30407 



8.52412 



H 



= 0.03343 



