﻿Zeeman Effect in Satellites of Violet Line of Mercury. 251 



displacement is nearly proportional to the square of the 

 field ; it gradually fades away and disappears in fields of u 

 few thousand gauss. The + branch is curved tor both lines, 

 the concavity being turned towards the —side; they both 

 approach the negative branch of —18, to which the lines are 

 finally immersed at H = 9000 gauss for —94, and at 

 H = 13000 gauss for —160. This singular phenomenon of 

 the ultimate fusion of lines was already observed in the 

 satellite —242 of the green line. Such behaviour has 

 already been observed by Wali-Mohammad * on the satellites 

 of cadmium and bismuth lines, and is probably characteristic 

 of the Zeeman effect of the satellites. It is questionable, if 

 we have to consider these two satellites as belonging to the 

 principal line, or to —18, in which they are finally immersed. 

 The positive branches of the s-components of these satellites 

 fade away in tolerably weak fields, but the negative branch 

 takes an hyperbolic course, and approaches —18, almost 

 asymptotically. Two of the satellites, —160 and —94, are 

 immersed in the upper, and —107 in the lower negative 

 branch of —18. This behaviour is similar to those already 

 observed for —160 and —94 in the p-components, and for 

 — 242 in the green line of mercury. The difference in the 

 behaviour is that, in the ^-components, the fusion of lines 

 takes place with a component whose displacement is not 

 proportional to the square of the field in the initial stage of 

 separation, while with the s-component the contrary is the case. 



The anomaly above described is mostly confined to 

 satellites which do not lie in the immediate neighbourhood 

 of the principal line. 



We have noticed that the farthest satellite —242 in the 

 green line shared this characteristic to a remarkable degree, 

 while for 4359, the satellites lying at - 160, - 107, - 94, and 

 4-185 from the principal, show a similar mode of anomalous 

 displacements. The satellites in the vicinity of the principal 

 line seem to be much affected by it, and are generally 

 displaced proportional to the field, the course of the curve 

 running in most cases parallel to the branches of the 

 prncipal line. 



The above fact is also borne out by the experiments of 

 Grmelinf, and Lunelund J, on the outermost satellite +224 

 of the yellow line X5790 of mercury, and of Wali- 

 Mohammad §, on cadmium and bismuth lines. Among the 



* Wali-Mohammad, Diss. Gottimren (1912); Ann. der P/u/s. xxxix. 

 p. 225 (1912). 



f Gmelin, Diss. Tubingen, p. 41 (1909). 



t Limelund, Aim. d. Phys. xxxiv. p. 50"> (191 L). 



§ Wali-Mohammad, he. cit. 



