Magnetic Separations of Iron Lines in Different Fields

1. The light emitted by the spark between non-magnetic nickel-steel terminals has been examined in different magnetic fields. 2. many lines photographed at a juxtaposition with a prism spectrograph placed behind an echelon spectroscope have enabled us to compare their relative separations exactly. 3. The separations of the lines photographed were compared with that of the line 4404.75, and, assuming the latter to be proportional to the magnetic field, the behavior of the others was studied. The assumption is verified by the fact that the separations of many sharp lines are proportional to the separation of the standard line. 4. The magnetic fields are calculated assuming the specific separation of the standard line 4404.75 given by Mr. Yamada. 5. Nine strong lines in the violet region being studied carefully, the separations of seven of them were found to be exactly proportional to the magnetic field, while the others gave larger specific separations for stronger fields, the components appearing more and more diffuse with the increase of the field, and the line 4415.13 was resolved into seven components in strong fields. 6. other less strong lines were also studied. Some of them give different types of separations, which are not proportional to the magnetic field, and the others show that their separations are proportional to the field. Specific separations are given for those measured with less accuracy or with only one or two fields. 7. nickel lines photographed on the same plate as the iron lines are also given. 8. Many sharp lines give separations proportional to the magnetic field as if there was no mutual influence between the radiating electrons, but the divergent values of the specific separations seem to indicate the existence of coupling. moreover the separations of a number of lines which are not proportional to the magnetic field, seem to indicate the existence of some mutual influence, though the measurements are not sufficiently accurate. 9. Many iron lines apparently show simple resolutions into diffuse components, which are likely to be resolved again into fine components, if they are examined in stronger magnetic fields with an instrument of higher resolving power