Page 3 - LESSON 15 LN1
P. 3

CLINICAL



                                       THERMOMETER




                  • It was invented by Daniel


                        Fahrenheit, in 1714.


                  • A thermometer works on

                        the principle that solids

                        and liquids expand on


                        heating.
                        h e  a  t i n g.

                  • As the temperature rises,

                        mercury expands causing

                        it to move upwards and

                        depict the temperature.


                  • As the temperature of

                        the bulb rises, the liquid


                        expands up the tube

                        through the constriction.
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