A popular item in the 1860s, popularised (though not invented) by Admiral Robert FitzRoy. The degree to which the liquid inside the orb crystalises is supposed to be predictive of weather conditions. See for yourself how well our scientifically accurate reproduction works! Brand Authentic Models Collection Materials Length (cm) Width (cm) Height (cm) Diameter (cm) Net Weight (kg) Colour Care Instructions Assembly Warranty 12 Months