STELLAR ATMOSPHERES. 



The number of lines (excluding the hydrogen serie*) in a Cygiii of 

 intensity over 4 (the maximum being represented by 10) is . . 40 



Of this number, the coincidences with enhanced metallic lines with 

 the dispersion employed amount to ..- .. .. .. .. 38 



9 



< Ci 



<< CO 



cc 



Ci 



CO 



c 



< <M 



pq 



The lines of the stars of intermediate temperature, like a Cygni, 

 have long been recognised by the Harvard observers as well as by myself 

 as presenting great difficultie3. 



E 



