Sun-Spots. 73 



They are Caused by Magnetic Perturba- 

 tions. 



What may be the forces in operation on 

 the part of the sun, and earth alike, which 

 may so interfere with the development or 

 transmission of light through the solar cone- 

 space ? 



The condition of the contents contained 

 within the enclosure of the sun-crust and 

 earth-crust, is presumably one of unrest ; its 

 actions varying from repose to the most vio- 

 lent agitation, with a tendency to the cyclonic 

 in its motions. Although the earth-core may 

 not be presumed to be an entire moving 

 mass, yet it is known to be in a measure in- 

 candescent, and molten. Magnetic storms 

 occur within our earth-crust which sway the 

 needle without, and almost instantaneously 

 manifest their presence over areas of more 

 than half the globe. The same phenomena 

 are undoubtedly present in increased devel- 

 opment at the sun. 



We may therefore with reason suppose 



that perturbations, however produced, occur 



within those spheres, of such an extent and 



character as might be a sufficient cause of 



4 



