PLEASURES OF THE TELESCOPE. 



"39 



panion of great mass in an orbit only six million miles in diame- 

 ter. Spica's spectrum resembles that of Sirins. The faint star 

 which our larger apertures show about G' northeast of Spica is of 

 the tenth magnitude. 



o 



Sweeping westward, we come upon 2 1GG9 a pretty little 

 double with nearly equal components of about the sixth magni- 

 tude ; distance 5-6", p. 124. But our interest is not fully aroused 



