storm glass

noun

a sealed tube containing a solution supposed to change in appearance according to the weather

Over the writing-table was a barometer and a storm-glass, while to the left a cosy corner extended round to the fireplace.

A storm-glass or barometer will keep you posted 24 to 36 hours before any weather change.

In every one of these changes the liquid in the storm-glass is passive; it is changed and waits until it is changed again.

He pointed to a storm-glass, which was certainly as clear as crystal.

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