Wall mounted thunder glass barometer with cast iron base packed in a gift box
This weather forecasting instrument originated at the beginning of the 17th century, and is perfect for the amateur weather forecaster
When the air pressure is high (good weather) the water level in the spout is low and when air pressure is low (bad weather) the water level rises.
When a thunderstorm is in the air the water rises up the spout and drips out. Comes complete with pigment for colouring the water and injector needle for easy filling.
