I. Undor Calculus and Charge-Conjugation.- Zusammenfassung. Resumo.- ? 1. Introduction.- ? 2. The Dirac wave-function (undor of the first rank).- ? 3. Charge-conjugation of four-spinors.- ? 4. Neutrettors of the first rank.- ? 5. Undors of the second rank.- ? 6. Covariant undor calculus.- References.- II. The Undor Equation of the Meson Field.- Zusammenfassung. Resumo.- ? 1. The Proca-Kemmer meson equation in undor notation.- ? 2. The generalized meson equation and the neutretto equation.- ? 3. The charge-conjugated meson equation.- ? 4. The charge current-density and the magnetic moment of mesons.- ? 5. Charge-invariance and statistics.- References.- III. The Heavy Quanta Theory of Nuclear and Cosmic Ray Phenomena.- ? 1. Introduction.- ? 2. The four types of meson fields proposed by Kemmer and the simplified deuteron problem.- ? 3. The charge-dependence of nuclear forces.- ? 4. Quantization and relativistic invariance of the theory.- ? 5. Elimination of the longitudinal electromagnetic field.- ? 6. Discussion of the Hamiltonian.- ? 7. The heavy quanta interaction between nuclons.- ? 8. The deuteron problem.- ? 9. The neutron-proton scattering.- ? 10. The spontaneous disintegration of heavy quanta..- ? 11. The ?-disintegration of instable nuclei.- ? 12. Scattering and absorption of mesons by nuclei.- ? 13. Discussion of the limits and the value of the theory.- References.- Samenvatting.Springer Book Archives