By Paul Lettinck
An account of what students have written at the topics taken care of in Aristotle's "Meteorology", this paintings investigates how they have been encouraged through each other and by means of past Greek commentators. for every topic a survey is given of the content material of the commentaries in addition to of later treatise.
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Additional info for Aristotle's Meteorology and Its Reception in the Arab World: With an Edition and Translation of Ibn Suwār's Treatise on Meteorological Phenomena and Ibn Bājja's Commentary on the Meteorology (Aristoteles Semitico-Latinus)
The ejected exhalation usually becomes inflamed and this is lightning. A hurricane is a wind that emerges from a cloud, similar to the wind that causes thunder; the difference is that in the case of a hurricane the wind forms a denser and more compact body. When the wind that is formed in a cloud does not emerge from it and collides with other winds in the cloud, it will get a circular motion. Finally it will descend, dragging the cloud with it. This is a whirlwind. When the constitution of the wind emerging from a cloud is rare, it becomes inflamed.
Ibn Sīnā, too, recognizes compression as a second possibility for condensation and follows Pseudo-Olympiodorus in his explanation of rain in Ethiopia by compression. On the other hand, for the explanation of hail Pseudo-Olympiodorus and Ibn Sīnā follow Aristotle in using άνιιπερίστασις. A1-Kindī describes the formation of precipitation in different ways. (1) There is a horizontal motion of exhalation (moist and dry) or air, which is caused by expansion due to the sun's heat: the air will flow from the place where it is expanded to a cooler place where it contracts; this horizontal flow is wind and when it arrives in a cold area, it densifies and the moist part turns into rain.
The moist exhalation is warmer than water, as it contains the fire that causes it to rise (347a24-25, discussion of dew and hoarfrost). The moist and dry exhalations are mixed in the lower atmosphere (where they form air) (358a21-24, discussion of the saltness of the sea). e. air is a mixture of the moist and dry exhalation. To sum up, Aristotle arrives at the following arrangement of matter in the sublunar world: Earth and water are in and around the centre. Two exhalations are dissolved from them by the heat of the sun: a dry exhalation (from the earth) and a moist exhalation (from the water).
Aristotle's Meteorology and Its Reception in the Arab World: With an Edition and Translation of Ibn Suwār's Treatise on Meteorological Phenomena and Ibn Bājja's Commentary on the Meteorology (Aristoteles Semitico-Latinus) by Paul Lettinck