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LIBER II · CAPUT 19

OF THE MOTION OF THE SUN AND THE CAUSE OF THE IRREGULARITY OF THE DAYS

OF THE MOTION OF THE SUN AND THE CAUSE OF THE IRREGULARITY OF THE DAYS. Complete modern editorial illustration created specifically for this chapter.
OF THE MOTION OF THE SUN AND THE CAUSE OF THE IRREGULARITY OF THE DAYS · EDITORIAL PLATE II.19 · modern editorial plate
OF THE MOTION OF THE SUN AND THE CAUSE OF THE IRREGULARITY OF THE DAYS. Complete modern editorial illustration created specifically for this chapter.

Latine · Mayhoff 1906

Sol autem ipse quattuor differentias habet, bis aequata nocte diei, vere et autumno, in centrum incidens terrae octavis in partibus arietis ac librae, bis permutatis spatiis, in auctum diei bruma, octava in parte capricorni, noctis vero solstitio, totidem in partibus cancri. inaequalitatis causa obliquitas est signiferi, cum pars aequa mundi super subterque terras omnibus fiat momentis. sed quae recta in exortu suo consurgunt signa longiore tractu tenent lucem; quae vero obliqua, ociore transeunt spatio.

English · Bostock & Riley 1855–57

The Sun himself is in four different states; twice the night is equal to the day, in the Spring and in the Autumn, when he is opposed to the centre of the earth, in the 8th degree of Aries and Libra. The length of the day and the night is then twice changed, when the day increases in length, from the winter solstice in the 8th degree of Capricorn, and afterwards, when the night increases in length from the summer solstice in the 8th degree of Cancer. The cause of this inequality is the obliquity of the zodiac, since there is, at every moment of time, an equal portion of the firmament above and below the horizon. But the signs which mount directly upwards, when they rise, retain the light for a longer space, while those that are more oblique pass along more quickly.