Of Philoponus' commentary on the Meteorology only that on chapters 1-9 and 12 of the first book has been preserved. It is translated in this series in two volumes, the first covering chapters 1-3; the second (this volume) chapters 4-9 and 12. The subjects discussed here include the nature of fiery and light phenomena in the sky, the formation of comets, the Milky Way, the properties of moist exhalation, and the formation of hail. Philoponus...