PURPOSE: To illustrate a very heat-sensitive device.
DESCRIPTION: This air thermoscope consists of a flask sealed with a stopper with a 4 mm diameter 50 cm long glass tube inserted into the (colored) water bath in the bottom of the flask such that the water level in the tube is above the level of the stopper. The water level in the tube rises when the flask is warmed by snuggling it in your hands.
REFERENCES: (PIRA unavailable.)
SETUP TIME: None.
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