A mysterious weather predictor that is sure to intrigue. Stormglass instruments have been in use since the 1750s. Admiral Fitzroy, the famous sailor and meteorologist, mounted an instrument similar to the stormglass on the mast of HMS Beagle as a storm warning instrument during his historic voyage with Darwin in the 1830s.
The premise is the changing weather affects the solubility of the mixture of chemicals in the sealed glass tube. Some believe that the changes in crystal structure have to do with the electromagnetic changes caused by weather and sun storms.
Stormglass can be displayed freestanding, or mounted to a wall or bulkhead using a bracket that is sold seperately.