The Fitzroy’s Storm Glass is a nautical barometer that can indicate the chance of storms, snow, wind or clear skies. Each glass contains a liquid of constantly evolving crystals that respond to changes in weather conditions.
Based on the principle that temperature and pressure affect solubility, the storm glass was developed by Admiral Robert Fitzroy during the historic voyage with Charles Darwin on the HMS Beagle. These instruments were widely used to by British seafarers in the 19th century to predict the possibility of storms at sea.
Today, Fitzroy’s Storm Glass remains popular with collectors of curious objects. The delicate, feathery formation of the crystals is beautiful to observe, making this item both an attractive ornament and an interesting conversation piece.