Fitzroy’s Storm Glass is a historical weather forecasting device that works on the idea that temperature and pressure affect solubility, sometimes resulting in clear liquid and other times causing precipitants to form. For example, clear liquid means clear weather while crystals on the bottom mean frost. The solution in the column includes distilled water, ethanol, potassium nitrate, ammonium chloride and camphor. The method by which the storm glass works is not fully understood, explanations include changes in barometric pressure and the effects of electricity across the glass.
The storm glass was popularised by Admiral Robert Fitzroy after his historic voyage on the HMS Beagle, when the British Crown distributed these to the populace after a particularly violent storm season. Modern meteorology is far more accurate, but these elegant glasses still hold aesthetic appeal. This storm glass is the same size and shape as our 28cm Galileo's Thermometer, and together they make an attractive pair. Instructions on how to set up and read the Fitzroy's Storm Glass are also included.
Each storm glass is made from hand blown glass and is not intended as a toy. Please handle with care and keep out of reach of children.
Product size: 280 x 57mm
Packaging size: 320 x 88 x78mm