398 DESCRIPTION OF AN AURORA BOREALIS. 



white light. The stars were seen through it, 

 though they were not so brilliant as during its 

 absence. I have every reason to think that not 

 only the various tints that are sometimes seen 

 in the Aurora, but also some other of its charac- 

 teristics, are the effects of refraction and reflection 

 of the original auroral light ; or in other words, 

 that they are secondary effects. 



