The Fitzroy storm sphere small
The storm glass, also called camphor glass, was invented before the beginning of the 17th century. It consists of an airtight glass body containing a mixture of water, ethanol, camphor, potassium nitrate and ammonium chloride, in which crystals form and dissolve depending on the weather conditions. The storm glass is supposed to allow a forecast over a period of about 24 to 36 hours.
It was mainly used by sailors to predict changes in the weather. The storm glass was made famous by Admiral Robert Fitzroy, on whose ship, the HMS Beagle, Charles Darwin travelled and made his groundbreaking discoveries. Together with Darwin, Fitzroy worked out the interpretation of crystal growth during this almost five-year voyage.
•Dimensions with base: approx. 13 x 6.5 x 6.5 cm (h/w/d).
•Diameter of the sphere: approx. 6 cm
•Scope of delivery: glass drop, wooden base with detailed explanations of function, history and operation.
Note: The Fitzroy storm glass is made of thin glass. Not a child's toy!