199 
finding a simple rule for the state of polarisation of the components. 
As regards the intensity, the supposition has already been expressed 
above that according as the electrons jump from or to strongly 
eccentric paths, the intensity of the produced components would be 
slighter. It is to be regretted that the material of observation does not 
allow us to test this supposition in every detail, because the values 
found by different observers are often contradictory. 
Minter (loc. cit. p. 112) gives, indeed, e.g. for the intensities of: 
TIALS LER Ot A tE Ì 
MEE ord Vins Ao ck aay 1 1 
Pee NAS Sn eh eI 
and from this appears a rapid decrease of intensity towards the 
outer components, (with which my “superfluous” components, which 
are still weaker, are in good agreement). Also the fact that the 
middle components are stronger, is in good harmony with this that 
each of the components can be produced by some different jumps. 
This investigation can, however, not yet-be universally carried 
through on account of the above-mentioned mutual contradictions. 
The causes of these differences of intensity have been investigated 
by Zrrman'), but it can seldom be inferred from the publications 
of the different observers what circumstances have given rise to 
their differences in intensity, and which are the reliable intensities. 
A research as discussed above will not be possible until this has 
been settled with certainty. From the results of such an investigation 
important conclusions might be drawn as to the correctness or in- 
correctnes of the hypotheses given by me in this paper. 
From what has been found so far I think I am justified in con- 
cluding that there are indications to be found in the material of 
observation for the validity of the ‘“Kombinationsprinzip’, also for 
the anomalous ZwerMaN-effect. It is, however, not excluded that a 
restrictive condition in the sense as given by Bonr (see above) causes 
the principle not to be always clearly manifested. 
At any rate I think I have shown that the “sequences” vary 
separately in the magnetic field, and that the observed Zurman-effect 
is the result of the variations of the two sequences together. 
In connection with this I am also of opinion that Bonr’s equation: 
WW 
h 
keeps its validity in the magnetic field. 
The Hague, May 7 1919. 
1) P. ZEEMAN, Proc. Amsterdam, Oct. 1912 and Researches in Magneto-Optics 
p. 94 et seq, Macmillan 1913 
2 
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