Note 23 — Chapter VI · THE STUDY OF NATURE. FUNDAMENTAL POSITIONS.
Oswald J. (Oswald Joseph) Reichel translation
Thus the upper portion of the air, owing to its proximity to the region of fire and the stars (Sen. Nat. Qu. iii. 10), is the warmest, the driest, and the rarest; but yet, owing to the evaporation of the earth and the radiation of heat, warmer than the middle, which in point of dryness and density is between the two, but exceeds both in cold. See p. 146, 4. ↑