William Widdop Galileo Thermometer & Storm Glass

It works based on Archimedes' principle. Small glass spheres of varying densities are suspended in a liquid. As the temperature changes, the liquid's density shifts, causing the spheres to rise or fall.

Generally, clear liquid means fair weather, cloudy liquid suggests rain or snow, and crystalline formations can indicate storms. However, it's best used as a visual guide rather than a definitive forecast.

This product is designed for indoor use to ensure stable environmental conditions for accurate readings and to protect the delicate glass components.

The liquid is typically a mixture of water, alcohol, and other chemical salts. When these salts precipitate or dissolve due to temperature and atmospheric pressure changes, they form visible crystals.

The Galileo thermometer provides a good visual indication of ambient room temperature changes. For precise scientific measurements, a calibrated thermometer is recommended.

The liquids inside are generally non-toxic, but the glass itself is fragile. If breakage occurs, carefully clean the area, avoiding contact with broken glass, and dispose of the contents and broken pieces responsibly.

Ensure the thermometer is on a perfectly level surface. Allow it to acclimate to room temperature for at least an hour. Avoid placing near drafts or direct heat sources.

The storm glass needs time and stable conditions to form crystals. Ensure it's not exposed to direct sunlight or rapid temperature fluctuations. Observe over several days for noticeable changes.

Contact the retailer immediately with details of the damage. Do not attempt to use or repair a damaged unit.

This is normal for some formulations and may be related to temperature. As long as the balls are still moving freely with temperature changes, it is functioning correctly.