THE great Ufe of the Table of Latitudes, we have fufficiently explained in the preceding Propofition; and alfo the famous Ufe of the Longitudes of Places in the end of Prop. iii. of this Chapter. For Example, having the Hour when an Eclipfe is to be in one Place, or when the Sun enters Aries, or when the Sun and Moon are in Conjunction, or the Hour of the Appulfe of the Moon to a fixed Star; to find the Hour when the fame will happen in another Place, whofe Longitude is marked in the Tables. This is done by turning the Difference of Longitude into Hours, and adding it to the other Place, if lefs, but substracting if more; which will give the Hour when the Phænomenon happens in the other Place. BUT BUT the principal Ufe of this Table will appear in the following Chapter. AND feeing the Ufe of the Declination and right Afcenfion of the fixed Stars is very neceffary in Geography and Navigation; we here add a Table of them; for the Year 1710. 'Tis known in Aftronomy, that there is a Change in these, by reafon of the Motion of the fixed Stars on the Axis of the Ecliptic. 'Tis proper to have a Table of a great many Stars; for the fame Stars are not always above the Horizon at Night. We add them here, chiefly for the Practice of young Students, that they may work the Problems. This belongs to Aftronomy, but is alfo of great Ufe in Geography and other Sciences. BY Aftronomy we find the Declination and right Afcenfion for each Year. The Tables follow. A Table of the Sun's Right Afcenfion. Janu. Febru. March April May June H. M.H. Days. M.JH. M. 4722 4900 3102 22 2120 5923 2221 04/23 0823 26.04 5300 3402 3004 2705 34 I 100 2321 2421 1223 2521 1623 5604 5507 03 2423 2201 0403 0004 5907 07 2823 2601 0703 0405 0307 ΟΙ 2204 1906 27 2306 30 Days. A Table of the Sun's Right Afcenfion. July August Septem. October Novem. Decem. Right Right Right Right Right Afcenfion Afcenfion Afcenfion Afcenfion Afcenfion Afcenfion H. MH. M.H. M.|H. M.H. MH. M. 1608 2410 2212 1708 2810 2612 1814 0916 1808 3210 2912 2114 1316 2514 1716. 24 18 38 1414 0516 1218 24 16 18 29 2018 34 1908 3610 3312 2008 4010 3612 28 14 2116 29 18 34 A Table fhewing the Right Afcenfion, Declination, and Magnitude of the Principal Fixed Stars. Caftor, or Northermoft Twin 2 07 Procyon, or the Little Dog 207 Lyon's Heart, or Regulus Upper of two laft in the Square Laft but two in the Bear's Tail Virgins Spike Great 1 09 I 09 210 III 2 12 0258 34 N 212 4057 27 N 1 13 1109 44 S Laft 1632 27 N 210 13 N 3116 05 N ( |