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Galileo Thermometers with Wooden Frame

Galileo Thermometers with Wooden Frame
In his search for recording temperature with precision, Galileo Galilei
(1564-1642) discovered a fascinating method. He put 4-5 glass balls in
cylinder filled with a special liquid to indicate the accurate temperature.
In liquid, solid substances with the same weight and size sink when
temperature rises, and they ascend when temperature falls. The glass balls
differ in weight and the density of the liquid means the lowest of the floating
ball in the upper part of the cylinder shows the accurate temperature.
The production of the thermometer is complicated and can only be made by
hand. Each ball is attuned to exactly 1 degree. Two glass balls differ in weight
by only 6/100g. Its accuracy and exclusiveness will no doubt give you a
distinct thermometer.

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