The storm glass was popularised by Admiral Robert Fitzroy after his historic voyage on the HMS Beagle. This storm glass is the same size and shape as our 28cm Galileo Thermometers, and they make an attractive pair on the windowsill.

The storm glass barometer came into general use in the early 1700's. The liquid within the glass is a mixture of several ingredients, most commonly distilled water, ethanol, potassium nitrate, ammonium chloride and camphor.

How the Storm Glass works is still a mystery, but it is believed that electromagnetic changes in weather patterns activate the crystals inside (sealed glass chamber fill with crystals when air pressure decreases). 

This is a gorgeous decorative gift idea for the adult who has everything or someone who finds meteorology fascinating. 

How to read:

A: Clear Liquid
Bright and clear weather
B: Cloudy Liquid
Sometimes with small stars and crystals at the top. Cloudy weather and often predicts thunderstorms and rain.
C: Small Stars in Liquid
Humid or foggy weather
D: Large Flaky Crystals
Cloudy skies, snow in winter. 
E: Threads of Crystals At The Top
Winy Weather
F: Crystals At The Bottom,
Frost may be coming.

Ages: 8+