Thunderglass With Castiron

The thunder glass has been used since the early 17th century and is very simple. During bands of high pressure on sunny days, the water level is pushed down into the spout, While during bands of low pressure on cloudy and rainy days, the water rises within the spout. In an approaching storm it rises so much that it will begin to drip.- packaged in full colour gift boxThunderglass with castiron, Cast iron, glass, blue dye powder

Dimension: 5.5x4.8x11 in