Day Equation of Time to the nearest Minute. Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec fub fub fub fub add add fub fub add add add add Day 1 If the equal or clock time be given, add or subtract the tabular numbers to or from it, as directed in the table; the fum or difference will be the apparent or folar time. But do the contrary to reduce the apparent to equal time. 2 23 25 22 440 53 21 6 59 37 23 18 44 20 22 20 52 30 23 23 10 17 23 128 48 25 27 17 39 4 24 19 57 57 12 9 6 20 14 27 6 29 2933 28 4 19 48 29 6 38 29 28 8 6 12 30 20 38 0 29 22 48 59 7 5:21 12 The Eclipfes of The Eclipfes of 8 23 50 6 fupiter's Satel 10 18 18 59lites will not be vifible this 3 14 54 39 5 9 23 25 12 12 47 501 19 14 42 54 9 11 36 12 11 18 42 14 5 47 34 16 o 16 28 near the Sun. 23 3 40 14 24 22 8 51 26 16 37 29 *28 11 6 2 30 5 34 35 24 20 41 15 26 15 10 16 28 9 39 18 30 4 8 20 31 22 37 221 To illuftrate the Ufe of the preceding Table by an Example. Suppofe on the 28th Day of December this Year, the Time of the Immerfion of Jupiter's firft Satellite be obferved by a Telescope in an unknown Meridian, to happen at 14h. 5 min. 22 fec. at Night; I find by the Table, that the Time of this Immersion will happen at the British Obfervatory at 12 h. 17 min. 2 fec. the fame Day: The Difference of the Times is 1 h 48 min. 20 fec. which being converted into Degrees and Minutes of the Equator, at the Rate of 15 Degrees per Hour, will make 27 deg. 5 min. the Longitude of the Place of Obfervation to the Eaft; because the Time is more than that at the British Obfervatory. Operation. Immerfion obferved Immerfion at Greenwich The Difference of Time 14h 5m 22° 12 17 2 1 48 20 27° 5' 0" WING. Many I know who perufe my Ephemeris, look very eagerly (at the first cutting the Leaves) for the Eclipfes; how many upon the Whole; how many of each Luminary; how many vifible; how many invifible; when or where they may be feen, &c. This, amongst the Sons of Drollery, and the Sons of Laughter, and idle Merriment, are looked upon as a Matter which no way concerns us; and fay with Comus, "What have we with these to do? "Sons of Care 'twas made for you." The Worshippers of Plutus, though they are properly the Sons of Care, will join the others in this. What have you to do with the Sun and the Moon? fay they: if the one lights you by Day, and the other by Night, they perform the Tak they were lighted up for; and that is fufficient for us. So far both Parties concur in Sentiment: but our Adorers of Plutus run a Bow's-fhot further, and moralize in manner following: The Sun, the Moon, and the wandering Stars, run their Race with Diligence, and perform their Bufinefs without Intermiffion. In this, let us copy them, and perform the Task allotted to us in the various Departments of Life with the greatest Diligence and Alacrity; fo fhall our old Age be comfortable, and our Offspring blefs our Memory. As to the Eclipfes, it is no Matter to us when or how they happen; it is enough for us to know that they do happen when it pleafes God; and that is fufficient for any reafonable Chriftian; but we may, however, take this Hint, viz. If they, in their cœleftial Courfes are eclipfed, how cautious ought we to be in our terrestrial Race, left we be eclipfed too; every trifling Lofs is a Tranfit into our Fortunes; but Bankruptcy a total Eclipfe. There is certainly a great deal of Morality and found Rea. I foning in the above Reflections. Yet if even in this Life, Men only came into the World to get Money; as Commerce depends upon Navigation, Aftronomy is their grand Affsistant, and Primum Mobile. But when we confider Man as a Being poffeffed with an Understanding far fuperior to thefe groveling Thoughts, of which, even a Swine, had he the Faculty of Speech, would tell you that was the height of his Ambition: Man, I repeat the Word; he who is made Lord of the Creation in this terreftrial Globe, and is Heir (if his ill Conduct forbids it not) to the Mansions of eternal Felicity; fhall he, I fay, mifs the Line Line which the Finger of God has pointed out, when he faid, by the infpired Penman, The Heavens declare the Glory of God; and the Firmament fheweth his handy Works. To lay in Store for future Want, the Ant and the Bee are fufficient Leffons. No Stars direct them to be (to our shame) Patterns to us. But the Lords of the Creation were born to higher Attainments, and more noble Aims, than the perishable and uncertain Commodities of this tranfitory Life, which, if they leave not us on this Side the Grave, we must step into that and leave them. The Wife never profeffed any particular Value for fuch fleeting Enjoyments; and if you ask the Man after God's own Heart, how he would chufe to employ his Studies; he will tell you in thefe Words, vide Pfal. viii. 3. I will behold the Heavens, even the Works of thy Fingers, the Moon and the Stars which thou haft ordained.' Another Evidence very applicable to the prefent Purpose is deducible from the Book of Wisdom, chap. vii. ver. 15, 19. 6 God hath granted me to speak according to my Mind, and to judge worthily of the Things that are given me; for he is the Leader unto Wisdom, and the Director of the Wife: How the Times alter, the Change of the Seasons, the Course of the Year, and the Course of the Stars!' which is perfectly conformable to the Dictates of the Apostle: vide Ja. i. 17." Every good and perfect Gift is from above, and cometh down from the Father of Lights, with whom is no Variableness, neither Shadow of turning.' Having, however, faid fufficient, I think to convince any reasonable Man of the high Value of that noble Science Aftronomy, I proceed to the Eclipfes, of which this Year affords but Two, and both Solar; the firft vifible, and the Second invifible, as follows: The First is a vifible Eclipfe of the Sun on Wednesday, June 4, in the Morning, Beginning End 7h 24 9 O Dig. eclipfed 3° 59′ on the 's fouthern Limb. The Moon makes her First Impreffion on the Solar Disk at 96° from the Sun's Vertex on the right Hand. The fecond will be an Eclipfe of the Sun, but invifible to us, and will happen on the 27th Nov. at 6h 10' in Long, 6o 16'. |