DE. W. M. HICKS : A CRITICAL STUDY OF SPECTRAL SERIES. 



361 



Krypton. The following table contains lines allocated to the D series for krypton 

 and discussed in the present communication : 



KrD. 



It will be clearer to consider first tne l) n lines by themselves, and then the satellite 

 lines in each order. From the first three lines the calculated formula is 



= 51655-56-N/jm+ "897262- - 00 

 / I 



m } 



The limit is within errors of the value found for S(), but in view of what 

 happens in the cases of X, and RaEm to be considered later, it may be noted that 

 the difference !) S^ = 4 '27 is very close to a S 1 displacement in S, ( oo ), which 

 would produce a separation of 4'42. [Note. If D ( o ) = S( oo ), here = -4'27 + 



3 D 2 



