Winds. 6 1 



What gives rise to the Currents. 



The changes in the magnetism of the earth 

 and atmosphere give rise to these currents. 

 They are developed in various forms. The 

 following may be mentioned as the most im- 

 portant. 



i st. The general and widespread pertur- 

 bations, occurring within the body of the 

 earth, and implicating immense areas, even 

 whole continents. 



2d. The interruptions of continuity of the 

 solar currents as in the phenomena called 

 sun-spots. These changes, to whatever cause 

 due, are capable of disturbing the terrestrial 

 magnetic equilibrium over varying areas, and 

 of working instantaneously. 



3d. The effects of the interruptions of the 

 sun's rays through the medium of clouds. 



4th. Purely local vito-magnetic, or electri- 

 cal, actions occupying smaller or larger 



areas. 13 



That the origination, suspension, and con- 

 tinuation of these movements, in all their 

 forms are due to purely vito-magnetic force, 

 we think demonstrable. Thus, no other can 



13 Appendix, p. 105. 



