XI 



and also a translation of the Mundi Thema, or 

 Geniture of the World, from the celebrated astro- 

 logical 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 com- 

 prehended in the greater mundane apocatastasis, 

 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 Mo- 

 tion, in which the perpetuity of time, and of the 

 bodies which are naturally moved with a circular 

 motion, is incontrovertibly proved, and is demon- 

 strated by what Plato calls " geometrical necessi- 

 ties" (yswi&sTpi'x.oi.is avyxaj). 



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 perspi- 

 cuous to the unprejudiced and intelligent reader. 



