Astronomical and Nautical €oUeciions, 447 



Egyptian year 

 of Nabonassar. 



beginning of the Olympic year 2604 : or, according to the 

 Connoissance des Terns, in July, 1828 ; and indeed Ptolemy 

 mentions a solstice as occurring towards the etid of an Athe- 

 nian year. 



367, Thoth (I.) 16, (p. 106, B. p. 278, H.)- The middle of a 

 lunar eclipse observed, at Babylon, at lOh. 10m. apparent, or 

 9h. 50m. correct Alexandrian time: the interval being 366 E. y. 

 15.4 days: correction 88. 62^. ^ - 380^-1 03. 58d. 



This was in the month Posideon the earlier, Evander being 

 archon at Athens. 



418. The first year of the first period of Calippus. The Cata- 

 logue of the Olympiads, CXII. 2, has the " Battle of Arbela: 

 beginning of the periods of Calippus of Cyzicum." The year 

 of Calippus probably began with the Olympic or Athenian 

 year : and the 50th ended in 468 ; consequently the first ended 

 in 419. See 597. 



425, Thoth 1. The first year after the death of Alexander ; begins 

 See 316.552. ^ -322^-133. 03^. 



438. The first year of the " Chaldean era."— See 504. Of this 

 era little or nothing more is known. 



454. Paophi(II.) 16, (p. 171, B. vol.2, p. 26, H.) Timocharis 

 says that he observed at Alexandria, in the 36th year of the 

 first period of Calippus, on the 25th of Posideon, at the be- 

 ginning of the 10th hour of the night, that the moon exactly 

 touched, with her northernmost point, the northern star in the 

 forehead of the scorpion : the longitude of the star, reckoned 

 from the autumnal equinox, being 32°, and its latitude 1° 20' N. 

 The year was the 454th of Nabonassar, the days elapsed 

 45.62 : the corection 109.69, giving ^ ^293^-94. 43<i. 



454, Tybi (V.) 5, (p. 170, B. vol. 2, p. 23, H.) Timocharis 

 writes that he observed at Alexandria, in the 36th year of 

 the first period of Calippus, the 15th of Elaphebolion, at the 

 beginning of the 3rd hour of the night, that the moon touched 

 Spica with her eastern limb, the star cutting off* exactly one 

 third of a diameter on the north : the year being the 454th of 

 Nabonassar: the star's longitude from the tropic of Cancer 

 being 82° 20' ; its latitude 2° south : the time Tybi 5, 8h. 



^ -293^-15. 72<J. 



464, The first year of Dionysius. See 476.. 507. This astro- 

 nomer named his months from the signs of the zodiac, and of 

 course employed the true length of the year, as far as it was 

 ascertained. He is said to have allotted to it 365d, 5h. 49m. ; 

 and to have made it begin the 26th June ; but perhaps with- 

 out any very good authority j for his determination of the year 



2 G 2 



