Size:Large Storm Glass Weather Forecaster How this storm glass really works is a mystery, but it is believed that electromagnetic changes in weather patterns activate crystals inside (sealed-glass chamber fills with crystals when air pressure decreases). Famed meteorologist Admiral Fitzroy used a storm glass on a historic voyage (1831-1836) with Charles Darwin. A storm glass works on the premise that temperature and pressure affect solubility, sometimes resulting in clear liquid; other times causing precipitants to form. However, the method by which this works is not fully understood. Although it is well-established that temperature affects solubility, some studies have simultaneously observed several different storm glasses forming similar crystal patterns at different temperatures. In addition, sealed glasses are not exposed to atmospheric pressure changes and do not react to the pressure variations associated with weather systems.Key Features: 1.The appearance of the liquid transforming from clear to cloudy to crystal flakes predict whether the weather will beclear, cloudy, snow or thunderstorms. 2.Drop type glass contain liquid repeat the crystallization of various expressions, depending on the weather changes. 4.Materials: borosilicate glass, compound liquid, water, ethanol, natural camphor. 5.Ideal gift for home decoration. 6.Size : approx. 11 x 20.5cm /4.3 inches*8.1 inches. Note: the Storm Glass may need one or two weeks for the crystal to stabilize and adapt to the environment. Do not place indirect sunlight or heating and air conditioning to avoid deterioration of the crystal!!! Package Includes: Storm Glass Wood Stand Elegant Gift Box
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