>454 Astronomical and JVautical Collections* 



Egyptian year 

 oiNabonassar. 



ander ; but even if it was on the 22d of June, as Mr. St. Mar- 

 tin supposes, it could scarcely have been on his road to the 

 Olympic games, that Diogenes died. The intercalary month 

 this ingenious critic thinks, the ** Dioscorus" mentioned in the 

 Maccabees. Plutarch tells us, that Alexander was born on 

 the 6th of the month Loiis, which was the tenth of the Mace- 

 donian year ; and this date agrees well enough with the story 

 of Philip's receiving an account of a victory at the Olympic 

 games, and of the birth of his son on the same day. 



574, Phamenoth (VII) 27, (p, 142. B. p. 389, H.) In the 7th 

 year of Philometor, which is the 574th of Nabonassar, the 

 27-8th of Phamenoth, the moon was eclipsed to the extent of 

 7 digits on the northern limb ; the interval from the epoch to 

 the middle of the eclipse being 573y 206<i 14^ mean time in 

 Alexandria. ^-173y + 37.51'i. 



The last year of Philopator having been 543 N. that of Epi- 

 phanes 567 N. the 7th of Philometor must have been 574 N. : 

 so that the lengths of the reigns of these kings assigned by the 

 chronologers is fully confirmed by the authority of Ptolemy, 

 as well as by that of the manuscripts of the Cholchytae still 

 existing at Turin. 



586, Mesore (XII) 30. (p. 60. B. p. 156, H.) Hipparchus says 

 that in the 17th year of the third Calippic period, the autumnal 

 equinox was observed the 30th of Mesore, abovit sunset. 



^-16ly+ 187.0^. 



The interval 187 days agrees with the direct observation of 

 Ptolemy (p. 72. B.) 



The autumnal equinox of the first year of this period must 

 have been in 570 N. We have already seen that Mesore 547 

 was in the 54th year of the second period, and Mesore 570 

 would have been in the 77th of that period, or the 1st of the 

 succeeding. 



589, Epagomenae (XIII) 1. (p. 60. B.) Three years afterwards, 

 that is, in the year 20, the equinox was at on the 1st of the 

 Epagomenae in the morning (© — 158^+186.9^. 



590, Epagomenae (XIII) 1. In the 21st year the equinox was 

 observed at the 6th hour. . ^^ - 157y+ 186.9^ 



601, Epagomenae (XIII) 3-4; aft:er 11 years, in the 32d year of 

 the period, the autumnal equinox was observed at midnight, the 

 17Sth year after Alexander, 285 years before the 9th of Athyrin 

 463 after Alexander : the observation was made with great care. 



^ - 146y+186.87^ 



602, Mechir (VI) 27. (p. 62. B. p. 154. H.) Hipparchus says, 

 that the vernal equinox was very accurately observed in the 



