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 | During the historic voyage, FitzRoy carefully documented how the storm glass would predict the weather: |
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| If the liquid in the glass is clear, the weather will be bright and clear. |
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| If the liquid is cloudy, the weather will be cloudy as well, perhaps with precipitation. |
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| If there are small dots in the liquid, humid or foggy weather can be expected. |
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| A cloudy glass with small stars indicates thunderstorms. |
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| If the liquid contains small stars on sunny winter days, then snow is coming. |
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| If there are large flakes throughout the liquid, it will be overcast in temperate seasons or snowy in the winter. |
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| If there are crystals at the bottom, this indicates frost. |
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| If there are threads near the top, it will be windy. |
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| Dimensions: |
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| The Storm Glass stands on a Mahogany wood base and is 9 inches tall. |
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