Galileo thermometer time lapse

2011-02-07
Galileo thermometer shows 20 degrees in 20 seconds!

"About 1593, Galileo constructed a thermoscope, using the expansion and contraction of air in a bulb to move water in an attached tube. Galileo also discovered that objects (glass spheres filled with aqueous alcohol) of slightly different densities would rise and fall." -Wikipedia

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