A GEE AT SOLAR OUTBURST. 



203 



Now, it is to be noticed in the first place, that 

 although the explosion thus described is the only one 

 of the kind that astronomers have yet witnessed, we 



FIG. 3. 



cannot safely infer that it was an exceptional solar 

 disturbance. It is to be remembered that the sun is 

 not always under spectroscopic surveillance, even in 

 suitable observing weather, at American and European 



stations. Professor Young in America, and in Europe 

 Lockyer, Janssen, Secchi, Respighi, and Zollner, with 

 the few others who take a more or less systematic part 



