CONTEXTS. 



SECTION IV. 



Theory of Jupiter's Satellites Effects of the Figure of Jupiter upon his 

 Satellites Position of their Orbits Singular Laws among the Motions 

 of the first Three Satellites Eclipses of the Satellites Velocity of 

 Light Aberration Ethereal Medium Satellites of Saturn and 

 Uranus Page 27 



SECTION V. 



Lunar Theory Periodic Perturbations of the Moon Equation of Centre 



Erection Variation Annual Equation Direct and Indirect 

 Action of Planets The Moon's Action on the Earth disturbs her own 

 Motion Excentricity and Inclination of Lunar Orbit invariable 

 Acceleration Secular Variation in Nodes and Perigee Motion of 

 Nodes and Perigee inseparably connected with the Acceleration 

 Nutation of Lunar Orbit Fomi and Internal Structure of the Earth 

 determined from it Lunar, Solar, and Planetary Eclipses Occulta- 

 tions and Lunar Distances Mean Distance of the Sun from the Earth 

 obtained from Lunar Theory Absolute Distances of the Planets, how 

 found 34 



SECTION VI. 



Form of the Earth and Planets Figure of a Homogeneous Spheroid in < 

 Rotation Figure of a Spheroid of variable Density Figure of the 

 Earth, supposing it to be an Ellipsoid of Revolution Mensuration of a 

 Degree of the Meridian Compression and Size of the Earth from 

 Degrees of Meridian Figure of Earth from the Pendulum . . . . 44 



SECTION VII. 



Parallax Lunar Parallax found from Direct Observation Solar Parallax 

 deduced from the Transit of Venus Distance of the Sun from the 

 Earth Annual Parallax Distance of the Fixed Stars . . . . 52 



SECTION VIII. 



Masses of Planets that have no Satellites determined from their Perturba- 

 tions Masses of the others obtained from the Motions of their Satel- 

 lites Masses of the Sun, the Earth, of Jupiter and of the Jovial 

 System Mass of the Moon Real Diameters of Planets, how obtained 



Size of Sun, Densities of the Heavenly Bodies Formation of Astro- 

 nomical Tables Requisite Data and Means of obtaining them . . 55 



SECTION IX. 



Rotation of the Sun and Planets Saturn's Rings Periods of the Rota- 

 tion of the Moon and other Satellites equal to the Periods of their Revo- 

 lutions Form of Lunar Spheroid Libration, Aspect, and Constitution 

 of the Moon Rotation of Jupiter's Satellites 65 



