Atomic Masses of Nuclides.- A. Reasons and methods for measuring masses.- B. Atomic masses of nuclides.- C. Some trends in atomic masses of nuclides.- General references.- Determination of atomic Masses by Microwave Methods.- 1. Introduction.- 2. Theory of mass determination from rotational spectra of diatomic molecules.- 3. Approximations contributing to error in mass ratio determinations from spectra of diatomic molecules.- 4. Polyatomic linear and symmetric top molecules.- 5. Experimental techniques for measuring microwave absorption lines.- 6. Experimental results.- 7. Conclusion.- Acknowledgment.- Determination of Nuclear Spins and Magnetic Moments by Spectroscopic Methods.- A. Atomic spectra.- a) Interaction between the nucleus and the electrons.- b) Determination of nuclear spin.- c) Determination of the nuclear magnetic moment.- d) Experimental methods.- B. Atomic beams.- C. Molecular spectra.- General references.- Isotope Shifts.- A. Nuclear mass effects.- B. Field effects for spherical, incompressible nuclei.- I. Nuclear volume effect.- II. Nuclear charge distributions.- III. Nuclear polarization.- IV. Non-Coulombic forces.- C. Nuclear deformation effect.- I. Contribution to isotope shifts.- II. Measurements of nuclear deformation.- D. Nuclear compressibility and surface phenomena.- E. Atomic considerations.- F. Comparison with experiment.- G. Conclusion.- Kernmagnetische Hochfrequenz-Spektroskopie.- Einf?hrung.- A. Physikalische Grundlagen.- I. Statik und Dynamik eines Systems paramagnetischer Kerne.- II. Pr?zessionsbewegungen in einem konstanten Magnetfeld.- III. Pr?zessionsbewegungen in einem modulierten Magnetfeld.- B. Experimentelle Technik.- I. Br?ckenschaltungen.- II. Empfindliche Oszillatoren.- III. Impulstechnische Schaltungen.- IV. Das Magnetfeld.- C. Ergebnisse.- I. Absolutmessungen Experimente zur Bestimmung physikalischer Elementarkonstanten.- II. Relativmessungen Struktur der kernmagnetischen Spektren.- III. Kernmomenten-Bericht.- Zusammel³Ì