Table 312. 

 WAVE-LENGTHS OF FRAUNHOFER LINES. 



26s 



For convenience of reference the values of the wave-lengths corresponding to the Fraunhofer 

 lines usually designated by the letters in the column headed "index letters," are here tabulated 

 separately. The values are in ten millionths of a millimeter, on the supposition that the D Una 

 value is 5896.155. The table is for the most part taken from Rowland's table of standard wave- 

 lengths. 



Index Letter. 



a 



B 



CorH„ 



a 



Di 



D3 

 El 



E2 



\ 

 ba 



For H^ 



d 

 G' or H. 



Line due to - 



^ 

 (o 



o 



H 

 O 

 Na 



Na 



He 



(Fe 



(Ca 



Fe 



Mg 



Mg 



rFe 



|Fe 



r Fe 



>Mg 



H 



Fe 



II 



Fe 



Wave-length in 

 centimeters X lo'. 



7621.28* 



7594.06* 



7164.725 



6870.182! 



6563.045 



6278.303 t 



5896.155 

 5890.186 



5875-985 

 5270.558 



5270.438 

 5269.723 



5183.791 

 5172.S56 

 5169.220 

 5169.069 

 5167.678 

 5167.497 

 4861.527 

 4383-721 

 4340.634 

 4325-939 



Index Letter. 



g 

 h or Hg 

 H 

 K 

 L 

 M 

 N 

 O 

 P 



Q 



R 



Si) 

 S2) 



s 

 T 

 t 

 U 



Line due to — 



Fe 



Ca 



Ca 



H 



Ca 



Ca 



Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Ca 



Ca 



[Fe 



I 

 Fe 



Fe 



Fe 



Fe 



Fe 



Fe 



Wave-length in 

 centimeters X lo'. 



4308.081 



4307-907 

 4226.904 

 4102.000 

 3968.625 



3933.825 

 3820.586 

 3727-778 

 3581.349 

 3441-155 

 3361.327 

 3286.898 

 3181.387 



3179-453 

 3100.787 

 3100.430 

 3100.046 



3047-725 

 3020.76 



2994.53 

 2947.99 



• The two lines here given for A are stated by Rowland to be: the first, a line " beginning at the 

 head of A, outside edge"; the second, a "single line beginning at the tail of A." 



t The principal line in the head of B. 



$ Chief line in the o group. 



See Table 321, Rowland's Solar Wave-lengths (foot of page) for correction to reduce these values 

 to standard system of wave-lengths, Table 314. 



Smithsonian TAaLCS. 



