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and also a translation of the Mundi Thema Theme of the World, or Geniture of the World, from the celebrated astrological work of Julius Firmicus Maternus, because it not only admits with Ocellus the perpetuity of the universe, but unfolds the position of the stars at the commencement of each of the periods comprehended in the greater mundane apocatastasis The restoration or cyclical return of the universe to its original state, which consists of 300,000 years; the first period after a deluge and conflagration, being, as it were, a reproduction of the world.
I have likewise annexed a translation of select theorems from the 2nd book of Proclus on Motion, in which the perpetuity of time, and of the bodies which are naturally moved with a circular motion, is incontrovertibly proved, and is demonstrated by what Plato calls "geometrical necessities" (original: "γεωμετρικαις αναγκαις").
In the last place, I have added copious notes to these treatises, in order that nothing might be wanting to render the meaning of them perspicuous to the unprejudiced and intelligent reader.