and Oxygen in the Sun. 453 



O. Fe in Sim. Intensity. 



4631 4629-44 1 



473022 4 



4630-91 1 



463161 1 



4656 4654-7 



4657-71 



4683 4683-04 1 



4683-93 2 



4601-5 4600-09 In 



4601-8 1 



4602-11 4 



4607 4604-84 In 



4605-52 1 



4606-32 



4607-79 6 



4613 4611-38 8 



4613-35 4 



4614*29 1 



4693-5 4691-52 6 



4694-97 1 



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 In- 

 line, we find that between wave-lengths 3930-29 and 3938*55 

 Rowland gives eight lines which coincide with iron lines. 



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

 spectrum given in the Report of the British Association for 

 189.1, 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 * 



3938-16 



3938-59 



The starred lines are probably the iron lines given by- 

 Rowland 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. 



