Posterior Analytics (or "Analytica Posteriora") is a text by Aristotle (sculpture) Aristotle ( Greek: Αριστοτέλης Aristotelēs) ( 384 BC – March 7, 322 BC) was an ancient Greek philosopher. Along with Plato, he is often considered to be one of the two most influential philosophers in Western thought. He...
Aristotle.
Again, drawing on Aristotle's example in PosteriorAnalytics II 8, thunder is a noise made in a cloud (formal definition), and such a noise, in a cloud, is made (only) when fire is extinguished in it, and so thunder is the extinction of fire in a cloud.
In his literal commentary on the PosteriorAnalytics (1269-72) he notes that mathematics bears on matter because of the nature of matter, which leads it to have mathematical accidents, dimensions, that is, accidents which can be abstracted from matter and considered on their own in the mathematical disciplines without relation to matter.
Mathews, P.L. “A Study of the Literary Background and the methodology of St. Thomas's commentary on the PosteriorAnalytics of Aristotle.” Dissertation.