262 Sir J. N. Lockyer and Mr. Baxandall. Enhanced [July 13, 

 Chromium continued. 



1 . Fe line and p Cr lines apparently coincident. Solar line probably compounded 

 of both. 



2. p Cr and Si lines exactly coincident. Solar line probably 'due to both, but 

 mostly to Si. 



3. Solar line probably due more to p Cr than Fe. 



4. p Cr line possibly double. 



5. Solar line possibly due partly to some other element. 

 6 Solar line probably compounded of Fe andp Cr lines. 



Notes on Certain p Cr-Solar Lines. 



[1.] A 3979*66, Co (4). This enhanced line of chromium is apparently 

 coincident with a cobalt line, and also with the solar line \ 3979'664, to which 

 Rowland assigns a cobalt origin. As the adjacent cobalt line 3958'07 is quite as 

 strong as 3979'66, and only furnishes a solar line of intensity 2, it is not probable 

 that the solar line corresponding to 3979'66 would be of intensity 4, unless a line 

 of some other element were involved. It is very probable that the solar line in 

 question is compounded of the p Cr and Co lines. 



[2.] K 4618-97, Fe (4). This strongly enhanced Cr line is apparently 

 coincident with the solar line 4618'97 (intensity 4), Rowland's origin for which 

 is Fe. The nearest line of iron to this in Kayser and Runge's list is 4618'88 

 (2). Assuming that this is identical in position with the solar line, its intensity 

 is far too low to account for the solar intensity. The closely adjacent iron 

 line 4619-40, which is of intensity 6, gives a solar line of intensity 3, so that it is 

 very improbable that the far weaker iron line 4618'21 will produce a solar line of 

 intensity 4. There is little doubt that the solar line 4618'97 is chiefly accounted 

 for by the strongly enhanced chromium line, but the iron line at the same 

 position probably adds slightly to the solar intensity. 



