Zeeman Effect in Satellites of Mercury Lines. 



339 



other side. The linearity o£ the change in wave-length 

 and the field is not obeyed in weak fields, so that the 

 course taken by the branches o£ satellites is curved from 

 the outset ; in our experiments the lowest field was about 

 1500 gauss, where the separation is nearly normal ; in 

 strong fields they approach the principal line asymptotically. 



Fig. 2. 



546 L 



(//) 



— S\ vrv m. 



o o o 



o o o 



00 O «=t 



A.U. v ' + 



We were not able to discriminate all the lines separately, 

 so that doubtful curves are traced in dots. From the 

 appearance of these curves, we can consider the branches 

 of —46, —60, and —114 approximately as parabolas having 

 vertical axis, and the — branch of — 60 as a parabola 

 having horizontal axis. Thus for the -f branch of the 



Z 2 



