b. April 11, 1801 and d. August 11, 1854

Italian scientist. He wrote several scientific works, one of which “La Termocrasi,” explained his theory concerning the radiation of heat and the coloration of light. He originated valuable discoveries on these subjects.

Here the Proteus works his spells; the self-same
essence takes a million shapes and hues, and finally
dissolves into its primitive and formless form. The
sun comes to us as heat, and quits us as heat, and
between its entrance and departure the multiform
powers of our globe appear. They are all special
forms of solar power-the moulds into which his
strength is temporarily poured in passing from its
source through infinitude.

—The Infleunces of the Sun: John Tyndall

1670—Christian Huygens introduced the theory of oscillation.

1714—Newton explained the correct theory of fluids and the oscillation of waves.

1784—The Atwood machine was designed and described.

1797—Count Rumford boiled water by friction in London.

1799—Sir Humphry Davy melted ice by friction.

1843—Joule established the conservation of energy and the mechanical equivalent of the heat unit.

1852—Sir William Thomson discovered the dissipation of energy.

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