XII.] 



THE MAGNETIC PERTURBATION OF LINES. 



Ill 



the lines of magnetic force. If we represent the electric charge of the 

 ion by e, and its inertia by m, the ratio e/m in a field of given strength 

 is proportional to the precession, or spin, of the orbit of the ion. 



By using specially constructed electro-magnets, and arranging 

 special conditions of the experiment, it was not long before a magnetic 

 field was produced which was sufficiently strong to completely separate- 

 the components of the lines previously thought to be only broadened. 



MOO 

 * 



* i S 



2 1 A 



K* 



S'C * 



sir 



P tC 



"o 



fe 



S 1 2 & 



t^ * r- 



H c g^.S 



<d 1 5| : 



CO .5 _C S3 



o" 







It was found that while ,<?0m0 of the spectral lines were converted 

 into triplets, others were resolved into quartets, sextets, octets, or other 



