XVI.] THE DISTRIBUTION OF CHEMICAL GROUPS OF STARS. 135 



Figs. 40 and 41 are photographs of a glass globe, on which are 

 indicated the Milky Way; the secondary Milky Way, which starts 

 from it at one point of the heavens-and meets it again, is also shown ; 

 together with Gould's Star Way and the equatorial plane. The dark 

 wafers indicate the positions of the bright-line stars. 



Fia. 41. The Milky Way, where double in relation to the Equator and Gould's 

 belt of stars, showing that the bright-line stars (dark wafers) and new stars 

 (white wafers) are limited to the Milky Way. 



We find that these stars begin just before the doubling commences. 

 They continue along the plane, and are sometimes very numerous, and 

 they end just after the doubling ends ; and we notice there is a long 

 range of the Milky Way where it is single in which there is absolutely 

 no bright-line star at all. It looks, therefore, very much ae if there is 



