258 Bigelow — Magnetic Theory of the Solar Corona. 



proof of the correctness of the research, and also of the theory 

 by which it was interpreted. This curve has a minimum in 

 latitude about 60°, and a maximum in latitudes of about 30°, 

 speaking broadly ; on the contrary, the magnetic theory of the 

 distribution of force surrounding a permeable body in an 

 external magnetic field, shows that there is a maximum in the 



Comparison of the Magnetic and Electric Yectors in Latitude. 



axis of the field and a minimum at the equator. This comes 

 from the application of the formula for the normal component of 



the force, F w = — I.cos#, and for the tangential component, 



F t — — I. sin 0, where I is the induced magnetization and 6 



o 



the polar distance. The corresponding curve is drawn on the 

 diagram, and it is the curve without inflexion from the pole 

 to the equator. Therefore, we perceive that in the north mid- 

 latitudes something occurs which adds a component to diminish 

 the normal vector from an external magnetic field, and in the 



