Oscillations in Ionized Gases

oPHYSICS: I. LANGMUIR cisely the plane grating formula.It will be noted that, with the exception of two, all of the points fall to the right of the regions of "anomalous dis- persion," and that none of them falls in this region.It is due to this cir- cumstance presumably that the displacements of the electron diffraction beams from their x-ray analogues display no marked abnormalities.It will be noted also that although the values of ,u calculated from the diffrac- tion beams are rather scattered they are not inconsistent with the dispersion curve constructed from the more precise data of the reflection beams.