How this storm glass really works remains a mystery, but it is believed that electromagnetic changes in weather patterns activate the crystals inside; sealed-glass chamber fills with crystals when air pressure decreases. Framed in lacquered polished brass or chrome; can stand or wall mount. Wood Mounting Plaque has etched-brass or etched chrome plate that explains storm-glass dynamics. Predictions are usually 1-2 days in advance. The instrument is named after famed meteorologist Admiral Fitzroy, who used a storm glass on his historic 1831 voyage with Charles Darwin aboard the HMS Beagle.
• Storm glass weather predictor
• Framed in polished case
• Crystals form when air pressure decreases
• Can be wall-mounted or used on table top
• No batteries requiredSize
Storm Glass 7"H x 2" dia.
Mounting Plaques 8"H x 10"W Save $19.95 on the Storm Glass and Plaque sets!