1. Transverse Zeeman effect of 28 neon lines was studied simultaneously by two different methods, i.e. by using an horizontal echelon, and by using a Fabry-Perot interferometer crossed with a plane grating.
2. Most of the results agreed with the previous work of Lohmann, but for some lines the results were not in good agreement, necessiating the change of types assigned by Runge.
3. Beside the lines investigated by Lohmann, seven new lines were photographed and measured, these are
λ (by Watson) Separation Type 7032.65 9
a/2 6929.78 9
a/10 5820.29 3
a 5764.55 3
a/8 5689.96 9
a/2 5562.90 3
a/8 5330.90 9
a/6
4. The regularity in the constant frequency difference between many red lines is accompanied at the same time by the regularity in the separations and intensity distributions of magnetically separated lines.
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