21

21. The transformations of fire are, first of all, sea; and of the sea one half is earth, and the other half is lightning flash.

Zeller, i. 647 n. 1, regards πρηστήρ as identical with κεραυνός of Fr. 28. Burnett, Early Greek Philosophy, p. 153 n. 53, suggests fiery stormcloud, Seneca’s igneus turbo.