A weather forecasting tool used in the nineteenth century. A sealed glass container is filled with a transparent solution of several chemicals.According to changes in external temperature and weather, different types of crystals will appear in the bottle
A transparent solution consisting of several chemical substances in a glass container. Because of climate change, the shape of a variety of crystal will have a change.
Because it is a kind of crystal, so its change is not fast, it will change with the weather slowly changing.
1 x Weather forecast crystal with wooden base