4415-13 



4143-88 



4132-08 



Maguotic Soparatious of Irou Lines in Different Fields. (35 



the green region, maii}^ lines became so diffuse, wlieu tlie 

 magnetic field was increased, that I could not observe the sepa- 

 rations in a strong field, owing partly to the increase of the 

 luminosity of the continuous spectrum in the back ground and the 

 <lecrease of the intensities of the iron lines, and partly to dis- 

 turbances during the long exposure, but it seems to me that the 

 complicated resolutions of man,y lines are the principal cause of 

 failure. 



The specific separation of 4415" 13 seems to have a unit 



a=0'255x lO"'; the distance between the outer ^-components and 



that between the inner are 5« and 4a respectively, and the 



distance between the outer pair of the ^9-components is a. The 



specific separations of 4143'88 and 41o2'08 seem to have their 



^. , common unit, namely 



^' ' ^=0-351 X 10-*, the distances 



=-^^:i^ l)etween the ^-components 



I I being ob and 46 for l>oth 



=- — - ~' lines. Though we find 



I I considerable deviations for 



^^""^"""^^ ' the separations of the 



1 !, I p-components, i. e. the 



-''» -^ ^'' ^' *^" distance between the outer 



p-components of the former 

 line is 0*315 x 10"*, and those between the outer and inner pairs of 

 the latter are 2x0-371x10"*, and 0-371 xiO"*, respectively, the 

 discrepancy can be accounted for by the errors of measurements, 

 as these separations are too small to be measured accuratel3^ 

 Hence we may take 0*35l x 10"* as tlie unit of the separations of 

 these two lines. But we can find no relation ])etween a and /j. 



As for the nickel lines, the curvature in the separation curve 

 of 5477' 12 is clearly marked, Ijut we must study the separation 

 with the spark Ijetween pure nickel terminals or with concave 

 grating to be able to fix it definitely. 4714-68 shows a separation 

 curve similar to the iron line 537r405, but the measurement is 

 not so accurate. 440 1*77 shows a smooth curvature in the 

 separation curve, Ijut the observed points are not numerous enough 



