Note 238 — The Zodiac is far from bearing in itself a certain and excessively remote date.

See the Historical Researches regarding the Astronomical Observations of the ancients, by M. Ideler, a translation of which has been inserted by M. Halma in the third volume of his Ptolemy: and especially M. Freret’s memoir on the opinion of Lanauze, relative to the establishment of the Alexandrian year, in the memoirs of the Academy of Belles Lettres, vol. xvi. p. 308.