434. The ORRERY. This Machine shews the Motions of the Sun, Mercury,
Venus, Earth, and Moon; and occasionally, the superior Planets, Mars,
Jupiter, and Saturn may be put on; Jupiter’s four Satellites are moved
round him in their proper times by a small Winch; and Saturn has his
five Satellites, and his Ring which keeps its parallelism round the Sun;
and by a Lamp put in the Sun’s place, the Ring shews all the Phases
described in the 204th Article.
[Sidenote: The Sun.