Indoor Galileo Thermometer - 44 cmThe Galileo thermometer is made of a sealed glass cylinder containing a clear liquid and a series of sealed glass bulbs with different densities. When the temperature of the liquid changes, so does the density. A higher temperature causes the bulbs to sink. The lowest bulb in the upper section of the thermometer shows the right temperature. This beautiful sealed glass container contains 10 colourful, carefully weighted balls of hand blown glass. This