Heebie Jeebies Fitzroy's Storm Glass
This Storm Glass was developed by Robert Fitzroy, captain of the HMS Beagle during its famous voyage with Charles Darwin. During the historic voyage, Fitzroy carefully documented how the storm glass would predict the weather.
A Storm Glass works on principle that temperature and pressure affect solubility, sometimes resulting in clear liquid, other times causing precipitants to form. Each Storm Glass included the instruction below:
Clear Liquid : Fair Weather
Murky Liquid : Rainy Weather
Crystals at the top : Thunderstorms
Large Flaky Crystals : Cloudy Skies, Snow in winter
Thread of Crystals : Windy Weather