The spectrum of H2. The bands analogous to the line spectrum.—Part I

Abstract §1. Previous history and general statement. §2. Properties of the system 3 1B→2 1S, here called the strong Q band system. §3. Properties of the 2 1S state and comparison with the B state of the ultra-violet bands. §4. Properties of the system 3 1C→2 1S, here called the system with R very strong, P weak. §5. Comparison of 3 1B→2 1S and 3 1C→2 1S. The energy levels and the combination rules.