Mat 25, 1917] 



SCIENCE 



547 



Fig. 37. The Milky Way, photographed liy Barnard with the Bruce 10-inoh telescope of the 

 Yerkes Observatory. 



[Of special interest is a small isolated nebula with a fifth magnitude star, BD — 10° 4713, 

 near its center; nebula and star in the region poor in stars near the center of the photograph.] 



Those who would suggest that the red 

 stars^ may be the young stars must start 

 with stars uniformly distributed over the 

 sky, and unassociated with nebulosity ; and, 



''This does not include the extremely red (Har- 

 vard Class iV) stars. We refer to the 457 naked- 



transforming them through and past the 

 red and yellow stages, must carry them pre- 

 vailinglj^ into the galactic regions, where; 

 as Class B, or extremely blue stars, they 

 eye red stars of Class M. in Pickering 's table, page 

 507, which are prevailingly the more massive mem- 

 liers of their spectral class. 



