332 J. Trowbridge — Carbon and Oxygen in the Sun. 



The following table gives the oxygen lines and iron lines in> 

 the same region of the spectrum. 



Fe in Sun. 



Intensil 



4629-44 



1 



4730-22 



4 



4630-91 



1 



4361-61 



1 



4654-7 





4657-71 





4683-04 



1 



4683-93 



2 



4600-09 



In 



4601-8 



1 



4602-11 



4 



4604-84 



In 



4605-52 



1 



4606-34 





4607-79 



6 



4611-38 



8 



4613-35 



4 



4614-29 



1 



4691-52 



6 



4696-97 



1 



4631 



4656 

 4683 

 4601-5 



4007 



4613 

 4693*5 



The faintest iron lines are therefore not obliterated in the 

 spaces where the oxygen lines should occur. If we examine 

 the great absorption region about the K line, we find that 

 between wave lengths 3930*29 and 3938'55 Kowland, it gives 8 

 lines which coincide with iron lines. 



From the table of wave lengths of iron lines in the arc spec- 

 trum given in the report of the British Association for 1891, 1 

 find the following lines given between these limits. 



3930-37* 



3931-22* 



3932-71* 



3933-01* 



3933-75 



3934-47 



3934 81* 



3935-40* 



3935-92* 



3937-42* 



2938-16 



3938-59 



The starred lines are probably the iron lines given by Row- 

 land in his list of standard solar lines. The iron lines that are 

 not starred apparently are obliterated in the great absorption 

 band near the calcium line K. 



