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Ideas from 'fragments/reports' by Anaximenes [546 BCE], by Theme Structure

[found in 'Early Greek Phil II: first Ionians' by Anaximander (ed/tr Laks,A/Most,G) [Harvard Loeb 2016,978-0-674-99689-2]].

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26. Natural Theory / A. Speculations on Nature / 6. Early Matter Theories / c. Ultimate substances
1497 For Anaximenes nature is air, which takes different forms by rarefaction and condensation
                        Full Idea: Unlike Anaximander, Anaximenes' underlying nature is not boundless, but specific, since he says that it is air, and claims that it is thanks to rarefaction and condensation that it manifests in different forms in different things.
                        From: report of Anaximenes (fragments/reports [c.546 BCE], A5) by Simplicius - On Aristotle's 'Physics' 9.24.26-