1888.] of the various Species of Heavenly Bodies. 



67 



account of the increased temperature. 1 and 10 are only occasionally 

 seen in this species. 



Sp. 12. Characteristics : with, the expansion of the continuous 

 spectrum towards the blue, band 9 becomes very narrow, and cannot 

 be observed with certainty. The other bands, with the exception of 

 7 and 8, are becoming wider and paler, while 2 and 3 still gain in 

 supremacy. 



Sp. 13. Characteristics : 9 has now entirely disappeared, 2 and 3 

 still retaining their supremacy. 



Sp. 14. Characteristics : all the bands are pale and narrow ; 2 and 3 

 will still be darkest, but the difference will not be so great as in the 

 species preceding. 



Sp. 15. Characteristics : in ordinary members of this group, 2 and 

 3 now alone remain visible : they are wide, but feeble, as the contin- 

 uous spectrum which, has been rapidly developing during the last 

 changes is now strong. 



