Note 39 — Chapter XXXVIII · TIMÆUS AND KRITIAS.
Reading edition
Plato, Timæus, p. 39 C. ἡ τῆς μιᾶς καὶ φρονιμωτάτης κυκλήσεως περίοδος. Plato remarks that there was a particular interval of time measured off and designated by the revolution of each of the other planets, but that these intervals were unnoticed and unknown by the greater part of mankind.