1898—1902. No.eJ 



TERRESTRIAL MAGNETISM. 



17 



1900. July 31. Obs. Isachsen. 



a — 111 = 63° 42'. 9 



Mark i74°2i'.o 



1900. August I. Obs. Isachsen. 



Mark I74°23'.5 



1900. August 2. Obs. Isachsen. 



L.T. 

 ll m 



9 12 a. m. 



17 

 20 



24 



35 

 40 

 46 

 50 



Mark 175° lo'.o 

 Needle 



Pi 

 Pi 

 P2 



Pi 

 Pi 

 P2 

 P. 



M 



180 17.5 



37-5 

 18.5 

 18.5 

 42.0 

 42.0 



39.5 

 20.5 



a — m = 62° 53'.9 



L.T. 

 h m 

 9 18 a. m. 



43 



9 30 a. m. 



243 16.9 

 27.4 



243 22.2 



;Mark 175° lo'.o 



