104 



Though \ve have very little knowledge of the circum- 

 stances ruling around the south pole, we can however re- 

 gard them as analogical with those in the north polar- 

 regions and that there also exists a maximum-belt both 

 of the auroras and of the earth-currents. 



This outline pictur of the Earths magnetic and electric 

 state, is founded principally on the experience and on ge- 

 nerally known physical laws, though it is natural that some 

 gaps here and there, left open by experience, have been fil- 

 led by suppositions. 



It shows us that in the polar-regions we have to search 

 for the key to many not explained circumstances, princi- 

 pally the magnetic perturbations and other questions in re- 

 lation with them, as their dependence of the sun and its 

 changes, which we see in form of sunspots. How this de- 

 pendence can be easily explained is shown in an other 

 paper *). 



*) Lemström : On the cosmical relations etc. Lecture at the meteo- 

 rological congress of Chicago 1893. 



