﻿^44 Prof. Nagaoka and Mr. T. Takamine : Anomalous 



In order to avoid the ambiguity in the position of the 

 priucipal line, the position o£ satellites is sometimes referred 

 to that lying farthest towards the violet. But we believe 

 that finer structures will no more be forthcoming, and in 

 discussing the Zeeman effect especially, it is convenient 

 to refer the position of satellites to that of the principal 

 line. 



As the examination of this fine group of lines is only 

 possible so long as the light is quiet and steady, the Zeeman 

 effect of each of the lines forming a cluster is almost im- 

 possible to follow in the present stage of our experiments. 

 Owing to this circumstance, what we consider as the magnetic 

 separation of the principal line refers to that of the cluster. 

 Whether the structure remains unaltered in magnetic fields 

 or not, seems to be an important problem, but special 

 means and arrangements will be required to decide the- 

 question. 



According to Eunge and Paschen, the principal line 

 X 4359 is divided into a regular sextet, following the rule 



— 95 in 62 ? +- a - This is only approximately fulfilled. 



To test the deviation, we compared the separation with that 

 of the green line, which almost exactly obeys the rule,. 



0> i 9' — a > +9 fl ' + 2a. These two lines were photo- 

 graphed side by side in the same field (PL III. fig. 1 a and 

 fig. 1 b). By increasing the field gradually, the following- 

 results were obtained : — 



H in gauss. 



±a\ 1 (p± 1 ). 



+tfx 2 (P± 2 ). 



±S\ 3 (B ±3 ). 





oX 3 



13900 



62 in. A. U. 



178 m.A.17. 



241 m.A.U. 



2-88 



390 



18200 



81 ,. 



240 „ 



321 ,, 



2-96 



4-00 



21000 



94 ,. 



267 ,. 



365 „ 



2-84 



3-88 



22800 



102 ., 



300 „ 



400 „ 



2-94 



3-92 



24400 



109 „ 



316 .. 



429 „ 



2-90 



394 



The branches of the sextet are designated bv the letters 

 P +1 , P +2 , P +3 and P_ l5 P_ 2 , P_ 3 , of which P +1 and P_ x 

 vibrate parallel (p), and the rest perpendicular (s) to the- 



