PART II. POLAR MAGNETIC PHENOMENA AND TERRELLA EXPERIMENTS. CHAP. I. 



Both these assumptions are possible, but it is not easy to say which is the more correct one. 

 It will thus be a matter for future research to procure a clear understanding of this point; the present 

 observations are too few. 



The positive system, with its area of divergence, comes out very distinctly on Chart V, with all 

 the characteristics of such a storm. The point of divergence of the system is evidently in the vicinity 

 of Pavvlowsk. P, is here positive in direction, and the horizontal forces are sometimes very small. 



In addition to this, the field is characterised by the negative storm, which now, as already men- 

 tioned, seems to have moved towards the west, while at Cape Thordsen we also now find negative 

 perturbing forces. 



There is nothing very new to be seen on Chart VI. Judging from the current-arrows in Central 

 Europe, we should be inclined to suppose that the positive system of precipitation has extended farther 

 westwards; but at the same time the more northerly negative storm has also increased in strength, so 

 that the two counteract each other's effect in a horizontal direction in Jan Mayen. In vertical intensity, 

 however, both systems at that station act in the same direction, and we therefore find powerful negative 

 perturbing forces there. 



As we have said, the negative circuit is now more distinct. 



At Little Karmakul, sometimes the positive, sometimes the negative system is the more powerful. 



On the last chart, Chart VII, the powerful systems have disappeared, and we find only faint 

 indications of the former powerful storms. 



At the first, and to some extent the second hour, there are still forces of some considerable 

 magnitude; but at the last hour it is for' the most part only at Kingua Fjord that storms are still going on. 



TABLE LVI1I. 

 The Perturbations of the i5th October, 1882. 



