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Preparation for the Gospel

Eusebius of Caesarea, tr. Gifford, 1903

Book 15, 42. Of the Heaven, What is Its Substance

‘ANAXIMENES: it is the circumference of the outer zone.

‘Empedocles: the heaven is solid, formed from air compressed by fire into a crystallized form, and encompassing the whole elements of fire and air in each of the hemispheres.