clinical thermometer![click to hear](/images/speaker.jpg)
More precise than the alcohol thermometer, it is used to take the temperature of the human body; it is graduated from 94°F to 108°F.
expansion chamber ![click to hear](/images/speaker.jpg)
Space that is taken up by the gas in the capillary bore; it is pushed back as the mercury rises into it.
stem ![click to hear](/images/speaker.jpg)
Glass tube containing the capillary bore.
capillary tube ![click to hear](/images/speaker.jpg)
End of the glass tube in which the mercury rises or falls with the temperature; the mercury thermometer tube is filled with gas.
scale ![click to hear](/images/speaker.jpg)
Divisions of equal length (degrees) marked on the thermometer that constitute the units of measurement.
column of mercury ![click to hear](/images/speaker.jpg)
Quantity of mercury that is contained in the capillary bore; its height varies with the temperature.
constriction ![click to hear](/images/speaker.jpg)
Narrowing that prevents the mercury from spontaneously dropping into the bulb as the temperature lowers (the thermometer must be shaken to make it go down).
mercury bulb ![click to hear](/images/speaker.jpg)
Glass reservoir containing mercury (a liquid metal) that expands and rises in the capillary tube as the temperature rises.