III. But wind does not thus depend on density; cloudy or misty weather does not necessarily produce wind, while wind is produced when the morning sun dissipates the air. Democritus is, therefore, wrong 195 IV. Wind arises in two ways--from the interior of the earth by emission--like wind on the stomach!--and from evaporation 196 V. The air has inherent power of movement, which is the chief cause of wind, evaporation being a less powerful one. Water has the power of moving and of imparting life to animals and plants 197 VI. Fire even, the destroyer, sometimes generates life. Air in like manner has a peculiar power of its own 197 VII. _Breezes before dawn_ arise from rivers, etc. Do not last long 198 VIII. _The “gulf” wind_ (ἐγκολπίας): its origin and duration 198 IX. Connection of winds with seasons of the year and with the heat and light of the sun. The sun does not directly cause the winds 200 X. Some cite the Etesian Winds as proof that he does. They blow in summer when the snows melt and the moisture is carried South 201 XI. But as to the effect of the sun, there is no analogy between the Etesian Winds, which do not spring up till late in the day, and the winds which rise at dawn and fall as the day advances 202 XII. _Cloud squalls_ (ἐκνεφίας). Their formation and combinations 203 XIII. The breaking up of clouds produces wind. Air, in an effort to get free, or heat, may produce this. Interruption of free passage may produce a whirlwind, just as an obstacle in a river a whirlpool. _Violent whirlwinds_ take fire (πρηστήρ). Some winds produce different ones. An analogy holds between air and drops of moisture. A union of forces in air or in dew is necessary to give impulse and produce a current. Air and wind are merely a matter of degree 204 XIV. Mode in which the subterranean winds are generated and make their escape 205 XV. Ancient miners of Philip’s saw rivers and vast underground reservoirs. It is some consolation to read such a story, which shows greed is no new vice: the older generations were as reckless as we are in their quest for treasure better hid 207 XVI. The four _cardinal winds_. The full list includes twelve. Their names and directions 208