Note A — THE PREFACE.

Cicero translated the Phænomena of Aratus into Latin Verse. Julius Cæsar, as Pliny relates, wrote of Astronomy in Greek, and is said to have left several Books of the Motion of the Stars behind him, derived from the Doctrine of the Egyptians. Ant. Chris. 45. He with Sosigenes reformed the Roman Year, which was first invented by Numa Pompilius. Germanicus Cæsar also translated Aratus's Phænomena into Latin Verse Anno Dom. 15. Tiberius and Hadrian are also said to have wrote on Astronomy.