76 New Theories of the Great Forces. 



persons separated by even inconsiderable 

 distances would not always observe precisely 

 the same spot manifestations. Moreover, the 

 spots appear and vanish so quickly that no 

 correct estimate can be made at any single 

 locality. As well attempt to map and chart 

 the aurora borealis. 



Unbiassed Estimate of their Character and 

 Location. 



SCHEINER was one of the first who ever 

 observed these spots through a telescope, 

 and was therefore uncontrolled by theories 

 in his estimate of their character and loca- 

 tion. He held it " impossible that they 

 could be on the sun itself," and imagined 

 some of them to be "as far from the sun, as 

 the moon, Venus, or Mercury." 



