Galileo Thermometer 17 Inch Giftcraft Mom and her young child

Mom and her young child are sitting in the sled

fresh-cut Christmas tree fragrance for the holidays

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Galileo Thermometer 17 Inch Giftcraft Mom and her young childIts named after Galileo because he discovered the principle on which this thermometer is based that the density of a liquid changes in proportion to its temperature. As the temperature increases, the density of the clear liquid decreases causing the bulbs to sink; and vice versa. Tags attached to the bulbs then allow you to determine the temperature.