Fitzroy's Storm Glass - 28 cm

The Fitzroy's Storm Glass is an amazing little things and a fancy bit of science that will help you to accurately predict the the weather to come.

Popularised by Admiral Robert Fitzroy after his historic voyage on the HMS Beagle, you can now forecast the weather too by observing the appearance of the liquid in the glass. When the temperature and pressure of the atmosphere change with different weather patterns, the water and crystals inside the glass change too.

The perfect gift for someone who loves their barometer!

This storm glass is the same size and shape as our 28cm Galileo Thermometers, and they make an attractive pair on the windowsill.

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HJFSG28


$29.95

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    The Fitzroy's Storm Glass is one of those unusual yet amazing little things that you happen to stumble across from time to time. It is a fancy bit of science that will help you to accurately predict the kind of weather that is looming on the horizon!

    While this may seem somewhat unbelievable, Fitzroy's Storm Glass is a historical weather forecasting device that was used by seafarers on the HMS Beagle in the 1800's to predict windy weather or thunderstorms at sea!

    You can now forecast the weather by observing the appearance of the liquid in the glass. When the temperature and pressure of the atmosphere change with different weather patterns, the water and crystals inside the glass change too!

    This is based on the principle that temperature and pressure affect solubility, sometimes resulting in clear liquid, and other times causing precipitants to form. The liquid in the glass is a mixture of several ingredients including distilled water, ethanol, potassium nitrate, ammonium chloride and camphor.

    Written on the side of your Storm Glass is a key to assist you:

    • Clear liquid = Fair weather
    • Murky Liquid = Rainy weather
    • Crystals at the top = Thunderstorms
    • Large flaky crystals = Cloudy skies, snow in winter
    • Thread of crystals = Windy weather
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