Note 911 — Chapter VIII · THE WATERS
Reading edition
De phil. mundi, III, 19. See also De imag. mundi, I, 47. Hildegard of Bingen also believed that the interior of the earth is warmer in winter than in summer. She attributed this circumstance, however, to the fact that “in hieme sol supra terram sterilis est et sub terram calorem suum figit, quatinus terra diversa germina servare possit” (Causae et curae, I, Kaiser’s edit., p. 30). See also Subtilitates, II, 9, in: Migne, Pat. lat., vol. cxcvii, col. 1213.