Ancilla to the Pre-Socratic Philosophers, by Kathleen Freeman, , at sacred-texts.com
Thales of Milêtus was in his prime about 585 B.C.
Whether he ever wrote a book is unknown; if he did, no genuine fragment survives,.
1. (Title: 'Nautical Astronomy').
2. (There are two Hyades, one north and one south).
3. The much-discussed four substancesof which we say the chief is Water, making it as it were the one Elementby combination and solidification and coagulation of the substances in the universe mingle with one another. In what way, I have already explained in Book One.
4. (Titles: 'On the Solstice'. 'On the Equinox').