anaximenesFraggWNotes

Hipp. Philos. 7; Dox. 560. Anaximenes, himself a Milesian, son of Eurystratos, said that infinite air is the first principle,5 from which arise the things that have come and are coming into existence, and the things that will be, and gods and divine beings, while other things are produced from these. And the form of air is as follows:- When it is of a very even consistency, it is imperceptible to vision, but it becomes evident as the result of cold or heat or moisture, or when it is moved. It is always in motion; for things would not change as they do unless it were in motion. It has a different appearance when it is made more dense or thinner ; when it is expanded into a thinner state it becomes fire, and again winds are condensed air, and air becomes cloud by compression, and water when it is compressed farther, and earth and finally stones as it is more condensed. So that generation is controlled by the opposites, heat and cold. And the broad earth and the moon and all the rest of the stars, being fiery bodies,7 are supported on the air by their breadth.8 And stars are made of earth, since exhalations arise from this, and these being attenuated become fire, and of this fire when it is raised to the heaven the stars are constituted. There are also bodies of an earthy nature in the place occupied by the stars, and carried along with them in their motion. He says that the stars do not move under the earth as others have supposed, but around the earth,10 just as a cap is moved about the head. And the sun is hidden not by going underneath the earth, but because it is covered by some of the higher parts of the earth, and because of its greater distance from us. The stars do not give forth heat because they are so far away. Winds are produced when the air that has been attenuated is set in motion; and when it comes together and is yet farther condensed, clouds are produced, and so it changes into water. And hail is formed when the water descending from the clouds is frozen ; and snow, when these being yet more filled with moisture become frozen,11 and lightning, when clouds are separated by violence of the winds ; for when they are separated, [Page 21] the flash is bright and like fire.12 And a rainbow is produced when the sun's rays fall on compressed air;13 and earthquakes are produced when the earth is changed yet more by beating and cooling.14 Such are the opinions of Anaximenes. And he flourished about the first year of the fifty-eighth Olympiad.
Plut. Strom. 3 ; Dox. 579. Anaximenes says that air is the first principle of all things, and that it is infinite in quantity but is defined by its qualities; and all things are generated by a certain condensation or rarefaction of it. Motion also exists from eternity. And by compression of the air the earth was formed, and it is very broad; accordingly he says that this rests on air; and the sun and the moon and the rest of the stars were formed from earth. He declared that the sun is earth because of its swift motion,' and it has the proper amount of heat.
HOW DID HE THINK:

Plut. Prim. Frig. vii. 3, p. 947. According to Anaximenes, the early philosopher, we should not neglect either cold or heat in being but should regard them as common experiences of matter which are incident to its changes. He says that the compressed and the condensed state of matter is cold, while the rarefied and relaxed (a word he himself uses) state of it is heat. Whence he says it is not strange that men breathe hot and cold out of the mouth; for the breath is cooled as it is compressed and condensed by the lips, but when the mouth is relaxed, it comes out warm by reason of its rarefaction.
PUZZLE FOUND EMPIRICALLY, solved theoretically.

WHY AIR?

Arist. Metaph. i. 3 ; 984 a 5. Anaximenes regarded air as the first principle.
Simpl. de Coelo 273 b 45 ; Schol. Arist. 514 a 33. He regarded the first principle as unlimited, but not as undefined, for he called it air, thinking that air had a sufficient adaptability to change.

So, perhaps he thought as follows: air is as close to nothing as any thing is. There is also apparently no limit to it (it's bigger than the earth and ocean and it fills in everywhere.
Why not undefined? Perhaps because something that is un-defined has no de-finition, and the only thing like that is nothing, but it's hard to think of everything coming from nothing...
And then there's the puzzle: what could he have seen or experienced that was a convincing instance of air transforming and changing? Fire? Boiling water? Condensation of steam? All possible.

Theophrastos; Simpl. Phys. 6r 24, 26; Dox. 476. Anaximenes of Miletos, son of Eurystratos, a companion of Anaximandros, agrees with him that the essential nature of things is one and infinite, but he regards it as not indeterminate but rather determinate, and calls it air; the air differs in rarity and in density as the nature of things is different; when very attenuated it becomes fire, when more condensed wind, and then cloud, and when still more condensed water and earth and stone, and all other things are composed of these; and he regards motion as eternal, and by this changes are produced.

This seems to confirm it: air becomes fire and water: he could have seen that (or thought what he saw was that). But Stone? Earth? Perhaps ice is an instance?

AIR AS GOD?
Cic. de Nat, Deor. i. 10 ; Dox. 531. Afterwards Anaximenes said that air is god, [and that it arose] and that it is boundless and infinite and always in motion; just as though air without any form could be god, when it is very necessary that god should be not only of some form, but of the most beautiful form; or as though everything which comes into being were not thereby subject to death.

Cicero is arguing against Anaximenes' idea that air is god.
But he says what we have been saying: that something which is boundless, infinite, always, and in motion was a god to the Greeks.
Note the singular "god," not "a god" or "the god": god as a force rather than a person?

Arist. Meteor. ii. 7; 365 (a 17), b 6. Anaximenes says that the earth was wet, and when it dried it broke apart, and that earthquakes are due to the breaking and falling of hills ; accordingly earthquakes occur in droughts, and in rainy seasons also; they occur in drought, as has been said, because the earth dries and breaks apart, and it also crumbles when it is wet through with waters.

OBSERVATION: wet earth cracks and breaks as it dries: reasoned from small scale empirical observation to larger scale of earthquakes: empirical observation informs theory, and the theory solves an empirical puzzle (eathquakes exist, but no reason is apparent to the senses). Cf. when we called Anaximander the first "uniformitarian."

Simpl. Phys. 2,57v. Some say that the universe always existed, not that it has always been the same, but rather that it successively changes its character in certain periods of time; as, for instance, Anaximenes and Herakleitos and Diogenes.

Gives no details, but indicates that at different times, "the universe" is different: different how? do different laws apply? Is it a different shape? Size? Is it made of different things? Does it entirely disappear then reappear?

Aet. ii. 1 ; 327, Anaximenes et al.: Infinite worlds exist in the infinite in every cycle. 4; 331, The world is perishable. 11 ; 339. The sky is the revolving vault most distant from the earth. 14; 344. The stars are fixed like nailheads in the crystalline (vault). 19 347. The stars shine for none of these reasons, but solely by the light of the sun. 22 ; 352. The sun is broad [like a leaf]. 23; 352. The stars revolve, being pushed by condensed resisting air.
Aet, iii. 10; 377. The form of the earth is like a table, 15 ; 379. The dryness of the air, due to drought, and its wetness, due to rainstorms, are the causes of earthquakes.
Aet. iv, 3; 387. Anaximenes et al.: The soul is like air in its nature.