1. THE HALL EFFECT IN THE POSITIVE COLUMN OF AN ELECTRICAL GASEOUS DISCHARGE IN HELIUM
2. W. B. Thompson, Atomic Energy Research Establishment, Harwell, Report T∕R 1345 (1954).
3. Enhanced Interaction in the Positive Column
4. Here we neglect terms of the order of l+∕R which are small due to the assumption of collision-dominance.