Related Clues:
- Industrial waste
- Smelted-ore refuse
- Gas is in general more desirable than ever
- Waste from ore refining
- Waste from smelting
- Etna erupts with helium gas
- Coalmining waste
- Compound supplying Macbeth, for one, with energy
- Bad-mouth, in Britain
- Byproduct of petroleum refining
- Ore-refining residue
- Filaments in wrought iron
- Applied heat to neon, a colourless gas
- Cinders left in sink?
- Gas from Etna he fanned