TABLE OF CONTENTS. 



PAGE 



Introduction i 



Theory and Former Inn'estigations. 



1. General 3 



2. Possible Relation between Zeeman Separation and Pressure Displacement S 



3. Former Investigations of the Zeeman Effect for Iron 7 



4. Former Investigations op the Zeeman Effect for Titanium 8 



Apparatus and Methods. 



1. Spark .\pparatus 9 



2. The Electro-Magnet 11 



3. The Spectrograph 13 



4. Photographic Methods 16 



S- Measurement of Magnetic Field 16 



6. Methods of Measurement and Reduction 17 



Explanation of the Tables. 



1. Wave-Lengths 19 



2. Intensity 19 



3. Character of Separation 19 



4. Weight 20 



5. Values of AX 21 



6. Values of AX/X^ 21 



Table i, Measurements of Zeeman Effect for Iron 22 



Table 2, Measurements of Zeeman Effect for Titanium 35 



Types of Separation. 



1. Un.\ffected Lines 44 



2. Triplets 44 



3. Quadruplets 45 



4. Quintuplets 45 



S- Sextuplets 45 



6. Septuplets 46 



7. octuplets 46 



8. Nonets 46 



9. More Complex Types 46 



Relation of Separations to the Normal Interval. 



1. Summaries for Various Types 47 



2. Discussion of Relations to Normal Interval 49 



Possible Relations Betw'een Lines as Indicated by the Zeeman Effect 50 



Cases of Dissymmetry 51 



Law of Change of the A\-erage Separation of the A'-Components with the Wave-length ^ 53 



The Effect of the Magnetic Field lt>on Enhanced Lines 54 



COMP.\RISON OF the ReSLT-TS FOR THE ZeEMAN EfFECT AND FOR PRESSURE DISPLACEMENT 56 



Summary of Results 64 



Bibliographical References ds 



iii 



4111 



