ABSTRACT
Twentieth century scholarship on Strato of Lampsacus’ matter theory has been dominated by Hermann Diels’ proposal that the introduction to the Pneumatica of Hero of Alexandria is substantially Strato’s work. In an article published in 1893, Diels noted that Hero’s introduction (30B) duplicates, virtually word-for-word, an argument that Simplicius attributes to Strato for the presence of poroi or passageways throughout matter (30A). Diels conjectured that not only this particular argument, but almost the entire introduction to Hero’s Pneumatics, is based on Strato’s essay “On the Void.”1
