Note 182 — Chapter I · SPECULATIVE PHILOSOPHY IN GREECE, BEFORE AND IN THE TIME OF SOKRATES.

Diogen. Laert. ix. 52. The danger incurred by Diogenes the Apolloniate at Athens is well authenticated, on the evidence of Demetrius the Phalerean, who had good means of knowing. And the fact may probably be referred to some time after the year B.C. 440, when Athens was at the height of her power and of her attraction for foreign visitors — when the visits of philosophers to the city had been multiplied by the countenance of Perikles — and when the political rivals of that great man had set the fashion of assailing them in order to injure him. This seems to me one probable reason for determining the chronology of the Apolloniate Diogenes: another is, that his description of the veins in the human body is so minute and detailed as to betoken an advanced period of philosophy between B.C. 440-410. See the point discussed in Panzerbieter, Fragment. Diogen. Apoll. c. 12-18 (Leipsic, 1830).

Simplikius (ad Aristot. Phys. fol. 6 A) describes Diogenes as having been σχεδὸν νεώτατος in the series of physical theorists.