— 12 — 



Doid alono would produce. Tho o.^tornftl niapnotic cfToct of tlio current alono 

 was always very small. Tlio current strengths necessary to balance in this 

 way tho vertical and horizontal components of tho earth's induction were thus 

 measured; and thuir ratio gives tho tangent of tlio anglo of dip. Tho rosulls 

 were as follows : — 



Mean 



Moan 



Kagoshima. 

 45' 24'. 

 W 12' 

 W 50' 

 45° 12' 



. 44° 50' 

 Naba. 

 38» 54' 

 37° W 



. 38° 1'/. 



llur. Intensity. 



Doclination. 



Dip. 



Tokio 



Kagoshima 



1.0000 



1.0503 



3° 18'.5 W 

 2° 25'.5 W 



4t° 50' 



Naha 



1.1315 



38^ KC 



