A sealed tube containing a liquid, the clarity of which was thought to change when storms approach.
- ‘The first storm glasses likely appeared around 1750, but their first documented shipboard use dates to the Beagle's famed 1831-36 circumnavigation.’
- ‘FitzRoy described the various crystal shapes and patterns that would develop within the storm glass according to different wind directions and weather conditions.’
- ‘Observing the liquid in the storm glass was supposed to indicate changes in the weather.’
- ‘The water barometer, or storm glass, is of the type used since the 17th century to demonstrate variations in atmospheric pressure quickly and reliably.’
- ‘If the liquid in this storm glass is clear, the weather should be bright and clear.’
We take a look at several popular, though confusing, punctuation marks.