Related Clues:
- Atmospheric pressure measurer
- Fluidless, as a barometer
- Not using liquid
- That's an emperor I had under pressure
- Being under pressure, that's a Roman emperor I had
- Elemental prophet and emperor, one and the same externally
- A Scottish couturier returns without mercury
- Type of barometer
- Measures pressure for Emperor in charity
- One sensitive to external pressure gives help to contain tyrant
- It measures pressure tyrant's accomplice brought about
- One responding to pressure from tyrant to help out
- Like some barometers
- Done curiously with air, not with liquid
- (Of barometer) using an evacuated vessel