19T 
im IT ER 
k= 2778 SE an 
I have extensively set this forth in my treatise “Le Phénomène 
de Zeeman et les séries spectrales’”’ '), and will henceforth refer to this. 
There I have demonstrated among others that for every “complex” 
of spectrum lines, i.e. all the spectrum lines whose frequencies satisfy 
equation (3) when the functions y and p are given, and 7 and & 
each pass through the series of the whole positive values, a definite 
type of anomalous ZerMAN-effect holds, provided the influence of the 
PascHEN-Back-effect be taken into account. Hence we may briefly 
say that every type of anomalous Zeeman-effect is determined by the 
form of the functions w and g. When these functions have once been 
determined, the difference of these funetions for positive whole values 
of the argument always yields a spectrum line with a definite type 
of Zeeman-effect. 
As has been shown more at length in my cited paper’), these 
functions may be indicated as: 
v= wy (i) — ¢ (4) (3) 
Single p s | d if 
Double de | Je. S | S' | D | DO F | F' 
| | | 
Triple a) a |m| =| =| "| a] a'| a] o lele 
Accordingly the symbol ME is the brief way of writing: 
tid ag sree 
ome es ene See 
For the Zerman-effects belonging to every complex I refer to (l.c). 
The above question may, therefore, now also be worded as follows: 
Is each of the above-mentioned functions (‘‘sequences’’) separately 
changed by a magnetic field, and is, therefore, the Zruuman-effect 
that is observed the result of the change of the two sequences together? 
Or could we ask when speaking of ZF-paths, >-paths ete., by 
which we therefore express that an electron that jumps from an 
=-path to a H-path gives rise to a spectrum line belonging to the 
complex 2’: 
Is every W-path, -path, etc. in a magnetic field each in itself 
p=) 2 | 
1) T. van Lonuizen, Arch. Musée Teyler (III) 2, p. 165, 1914. 
2) Henceforth to be indicated as (I. c.). 
