Corpus Hermeticum with Pneumatica and Ocellus Lucanus

...but when it is pressed down and held or crushed so as to keep it in place, [the air] does not allow the water to enter into it. And the reason for this is clear: it demonstrates that while air was thought to be empty, it is not possible for water to be poured in besides it, because the entire space within the vessel is already filled. If, then, one drills a hole in the bottom of the vessel, the water will indeed flow into it through the mouth, while the air will escape through the hole.

Furthermore, regarding the hole in the bottom: if one lifts the vessel straight up out of the water, raising it, the space within the vessel remains clear of the liquid, even though it was not previously [empty]; one must assume that bodies of air remain inside. For wind pneuma original: "πνεῦμα" (pneuma). In ancient Greek, this word can mean breath, spirit, or wind. Here, Heron provides a strictly mechanical definition. is produced by movement. For wind is nothing other than moving air.

If, therefore, after drilling the hole in the bottom of the vessel, we draw it into a pool of water, and the air is forced toward the hole, one will perceive the wind rushing out of the vessel. This is nothing other than the air being driven out by the water. One should not suppose, therefore, that among existing things there is any [continuous] vacuum, or that air exists unmixed possibly unmixed by itself. Instead, [the vacuum] is scattered through it, in small particles...

νζ original: "57"; likely a quire or folio signature.

Vocabulary: air, water, wind/breath, vessel, vacuum, wind produced by motion.