This 1930 book is a fascinating attempt to obtain a fuller understanding of molecular structure from spectral evidence.This 1930 book is a fascinating attempt to obtain a fuller understanding of molecular structure from spectral evidence. The investigation in particular throws lights on the macroscopic properties of molecular gases and the theory of chemical binding.This 1930 book is a fascinating attempt to obtain a fuller understanding of molecular structure from spectral evidence. The investigation in particular throws lights on the macroscopic properties of molecular gases and the theory of chemical binding.This 1930 book is a fascinating attempt to obtain a fuller understanding of molecular structure from spectral evidence. The investigation in particular throws lights on the macroscopic properties of molecular gases and the theory of chemical binding.Introduction; Part I. The Energy Levels of Diatomic Molecules and their Classification by Means of Quantum Numbers: 1. General foundations; 2. Wave mechanics of diatomic molecules; 3. Electronic levels; 4. Vibrational levels; 5. Rotational levels; 6. Stark and Zeeman effect; 7. Energy levels of polyatomic molecules; Part II. Fine Structure and Wave Mechanical Properties of the Energy Levels of Diatomic Molecules: 8. The perturbation function; 9. Rotational distortion of spin multiplets; 10. Fine structure; 11. Perturbations and predissociation; 12. Even and odd levels; 13. Symmetrical and antisymmetrical levels; Part III. Selection Rules and Intensities in Diatomic Molecules: 14. General foundations; 15. Electronic bands; 16. Vibrational bands; 17. Rotational bands; 18. Band spectra and nuclear structure; 19. Transitions in the Stark and Zeeman effect; Part IV. Macroscopic Properties of Molecular Gases: 20. Scattering; 21. Dispersion; 22. Kerr and Faraday effect; 23. Dielectric constants; 24. Magnetic susceptibilities; 25. Specific heats; Part V. Molecule Formation and Chemical Binding: 26. Heteropolar molecules; ló›