Astronomical and Nautical Collections. 461 



E(r\ ptian year 

 of Nabonassar. 



true place at first was in 3° 3' X» whence the moon's was 

 5° 10' n : in half an hour the moon must have advanced about 

 15', and allowing for the parallax, the true place of Rep^ulus is 

 found in SI '^° 10'. This was about 265 years after Hippar- 

 chus. The time at noon ^, + 139^ - 26.66^ 



886, Epiphi (XI.) 2. (Vol. 2. p. 183. H.) Ptolemy observed the 

 2d of Antonine, which was the 886th of Nabonassar, the 2-3 

 Epiphi, the planet Mercury before its greatest western elonga- 

 tion, at 4^ hours before midnight : compared with Regulus by 

 means of the a.jtrolabe, he was found in n 17^°, and was lj° 

 behind the moon's centre. ^^ + 139y+ 56.65*. 



886, Epiphi (XI.) 12. (Vol. 2. p. 214.H.) Ptolemy observed an op- 

 position of Mats in the 2d of Antonine, the 12-13 of Epiphi, 2 

 hours before midnight in / 2° 34'. ^ + 139y + 66.75*. 



886, Epiphi (XI.) 15, (Vol. 2. p. 233. H.) Ptolemy observed a 

 third opposition of Mars, 3 hours after the midnight of 15-16 

 Epiphi, in the second year of Antonine: in longitude 1"36'/, 

 and 1° 36' before the moon's centre. ^-fl39y + 69.96*. 



886, Mesore (XII.) 23, (Vol. 2, p. 177, H.) In the second year 

 of Antonine, the greatest elongation of Mercury was observed 

 by Ptolemy, in longitude ll 20° 5', by comparison with the 

 Hyades ; the distance from the mean sun being 20° 15'; in 

 the morning of the 24th of Mesore. ^+139^ + 108.04*. 



887, Athyr (III.) 9, (p. 161, H.) Ptolemy observed the au- 

 tumnal equinox, " with great care," on the 9th of Athyr, about 

 an hour alter sunrise, in the third year of Antonine, which was 

 the 463rd after the death of Alexander. ^ + 1 39y + 1 88 . 14*. 



The observation was probably influenced by the computa- 

 tion from those of Hipparchus, assuming the year too long. 



887, Pharmuthi (VIII.) 4, (Vol. 2, p. 199, H.) Ptolemy ob- 

 served the greatest elongation of Venus in the third year of 

 Antonine, the night of the 4-5 Pharmuthi, in longitude 13^ 

 50'' <Y>, by comparison with the Hyades : the distance from the 

 sun 48° 20'. . © + 140y - 31 . 40*. 



887, Mesore (XII.) 11, (p. 162, H.) Ptolemy found the summer 

 solstice, in the 463rd year after the death of Alexander, the 

 11-12 Mesore, about two hours after midnight. See Athyr. 



^ + 140y-f95.68*. 



[888?] Thoth (I.) 11, (Vol. 2, p. 194, H.) Ptolemy says that 

 he observed, in the " 14th" of Antonine, the greatest elon- 

 gation of Venus, in n 18j°; the distance 47| ; on the 11- 

 12th of Thoth. But we ought probably to read 4 for 14, the 

 I being the ascript of the article, and not a numeral ; the date 

 must be later than the 16th of Adrian. ^-|-140' + 130.6*. 



APRIL— JULY, 1828. 2 H 



