CHAPTER V

.--DISCOVERIES ADDED TO THE NEWTONIAN THEORY.

_Sect._ 1. Tables of Astronomical Refraction. 462 _Sect._ 2. Discovery of the Velocity of Light.--Römer. 463 {20} _Sect._ 3. Discovery of Aberration.--Bradley. 464 _Sect._ 4. Discovery of Nutation. 465 _Sect._ 5. Discovery of the Laws of Double Stars.--The Two Herschels. 467

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