2U 



Pkkston — Hifdiafing Phenomena in a Strong Magnetic Field. 



belongs to Kayser and Runge's second subsidiary series, being the first terms, 

 corresponding to n = 3, in their formula. We should, consequently, expect 

 these groui^s to behave similarly in the magnetic field, and to show effects which 

 arc similar for corresponding lines. That this expectation is realized is shown by 

 the followino- Table : — 



Thus the corresponding lines 5 183 "8, 5086, and 4810-7 of the different 

 substances possess tlie same value for m/e, while the other corresponding lines 

 also possess a common value for the quantity m/e. The value of this quantity 

 changes from one set of lines to another, showing, as we should expect, that the 

 different sets arise from differences in the source which produces them. 



Not only is the quantity 7n/e the same for corresponding lines in the same 

 and in homologous spectra, but, as shown in the above Table, the character of 

 the magnetic effect is also the same for corresponding lines. Thus, while the 

 lines along the lowest row, 5167, 4678, 4680 are all of the pure triplet type, 

 the lines of the middle row all become resolved into similar quartets in the 

 magnetic field, and the lines forming the top row are all somewhat diffuse, and 

 show as "soft" triplets, of which the constituents may be really complex on 

 further resolution. 



It thus appears that the observation of the radiating phenomena in the 

 magnetic field is likely to afford a valuable means of inquiry into the so far 

 hidden nature of the events which bring about the radiation from a luminous 

 body, and also give us, perhaps, some cleai'er insight into the structure of 

 matter itself. 



