Kitap 2
3.9
In the beginning the stars moved in the sky as in a revolving dome, so that the celestial pole which is always visible was vertically overhead; but subsequently the pole took its inclined position. He held the Milky Way to be a reflection of the light of stars which are not shone upon by the sun; comets to be a conjunction of planets which emit flames; shooting-stars to be a sort of sparks thrown off by the air. He held that winds arise when the air is rarefied by the sun’s heat; that thunder is a clashing together of the clouds, lightning their violent friction; an earthquake a subsidence of air into the earth.
3.9
Animals were produced from moisture, heat, and an earthy substance; later the species were propagated by generation from one another, males from the right side, females from the left.
