Similar to illustration: The illustration shows the slightly larger Fitzroy storm drop
Measuring 6.5 x 6.5 x 6.5 x 1.8 cm, the small Fitzroy storm ball is 5 cm high on a small natural wooden block.
Your future you will not be able to read from this "glass ball", but the future weather. The well-known Fitzroy storm glass is now also available in drop form.
The storm glass, also called camphor glass, was invented before the beginning of the 17th century. It consists of a hermetically sealed glass body with a mixture of water, ethanol, camphor, potassium nitrate and ammonium chloride, in which, depending on the weather, crystals form and also dissolve again. It was mainly used by sailors to predict weather changes.
The storm glass was made famous by Admiral Robert Fitzroy , on whose ship HMS Beagle Charles Darwin traveled and made his groundbreaking discoveries. Together with Darwin he worked during this nearly five-year journey, the interpretation of the crystal growth out.
The storm glass is to allow a prediction over a period of about 24 to 36 hours.
A possible cause for the changes of the crystals is seen in so-called Sferics, which are impulsive occurring electromagnetic waves of long range, which go back eg to thunderstorms.
Please note: The Fitzroy storm glass is made of thin glass. It is for this reason not a toy! It is delivered in a stable foam packaging.