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- Knockermen were made obsolete in the Ramtops when a dwarf in Ankh-Morpork invented the Davy lamp.
- The first trial of a Davy lamp with a wire sieve was at Hebburn Colliery on 9 January 1816.
- If flammable gas mixtures were present, the flame of the Davy lamp burned higher with a blue tinge.
- Released on Davy Lamp Records, all proceeds of the record were going to the Anti-Apartheid Movement.
- The Stephenson lamp was used almost exclusively in North East England, whereas the Davy lamp was used everywhere else.