Hermann Alexander Diels (German: [diːls]; May 18, 1848 – June 4, 1922) was a German classical scholar.He was educated at the universities of Bonn and Berlin and in 1886 became professor ordinarius of classical philology at the latter institution.He is now known for a collection of quotations from and reports about Presocratic philosophers. This work, entitled Die Fragmente der Vorsokratiker (The Fragments of the Presocratics), is still widely used by scholars. It was first published in 1903, was later revised and expanded three times by Diels, and was finally revised in a 5th edition (1934–7) by Walther Kranz and again in a sixth edition (1952). It consists of three volumes that present, for each of the Presocratics, both quotations from their (now mostly lost) works transmitted by later writers, and secondary-source material known as testimonia. Wikipedia
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