LIBER II · CAPUT 69
THAT THE EARTH IS IN THE MIDDLE OF THE WORLD
Latine · Mayhoff 1906
Mediam esse mundi totius haut dubiis constat argumentis, sed clarissimo aequinocti paribus horis. nam nisi in medio esset, aequales dies noctesque habere non posse deprehendere est dioptraeque vel maxime confirmant, cum aequinoctiali tempore ex eadem linia ortus occasusque cernatur, solstitiali exortus per suam liniam, brumali occasus. quae accidere nullo modo possent nisi in centro sita.
English · Bostock & Riley 1855–57
It is evident from undoubted arguments, that the earth is in the middle of the universe, but it is the most clearly proved by the equality of the days and the nights at the equinox. It is demonstrated by the quadrant, which affords the most decisive confirmation of the fact, that unless the earth was in the middle, the days and nights could not be equal; for, at the time of the equinox, the rising and setting of the sun are seen on the same line, and the rising of the sun, at the summer solstice, is on the same line with its setting at the winter solstice; but this could not happen if the earth was not situated in the centre.