TABLE 1.-Semi-Diurnal Arcs, allowing for refraction. Lat. Lat. Lat. Lat. Lat. Lat H Dec. 6 46 45 5 585 5 5 53 5 515 50 5 45 54 6 30 5 38 52 5 255 5 19 5 1 8 5 125 5551 4 59 44 4 524 + 4 45 4 4 38 4 4 304 4 23 44 Feb. March April May June July Aug. Sept. Oct. Nov. Dec. TABLE III.-The Right Ascensions, Declinations, &c., of the Fixed Stars ON THE USE OF THE PRECEDING TABLES. TABLE I.-By this Table the Sun's rising and setting may be found in any part of the kingom. Find the Sun's Declination, north or south, in the Calendar pages, for the day required: en look into the first column of this Table for the corresponding number of degrees; and in e same line, under the latitude of the place required, will be found the hours and minutes of e Sun's setting; subtract the same from twelve hours, and you have the time of his rising: uble the hours and minutes of setting, and you have the length of the day: subtract the same om twenty-four hours, and the remainder is the length of the night.-This process gives the in's rising and setting to apparent time: to which, if the equation of time, given in the lendar, be applied, the result will be the true clock time. TABLE II. and TABLE III.-From these Tables the approximate Time of the Southing of the incipal Fixed Stars may be found, as follows:-Add to the Mean Solar Time of the Southing of e First Point of Aries, the hours and minutes of the Right Ascension of any given Star, the sult will be the Mean Time from Noon of its Southing, or passing the Meridian. When the sult exceeds 24 hours, then subtract from it 24 hours, and the remainder will be the time ight from Noon. It is almost unnecessary to say, when the Southing of a Star comes out hours it is the same as one o'clock in the morning, and when 14 hours, two o'clock, &c. Note-This method will answer equally for the Southing of the Planets by using their Right cension, as given on the top of the Months of the Calendar; and when this is done, if with è Planets' Declination you take the corresponding hours and minutes (having regard to the itude of the place) from Table I., and subtract the same from their Southing, you have the ne of rising; and by adding, the time of setting. TABLE IV.-If to the time of High Water at London Bridge, as given in the Calendar, you ply the hours and minutes corresponding to any place mentioned in this Table, you have the e of High Water at that place. At Aberdeen Bar, the time of High Water happens 56 nutes before the time of High Water at London; at Aberdovy, 5 hours and 23 minutes after; Aldborough, 8 hours and 38 minutes after; at Chatham, 1h. 13m. before, &c. Vote.-Where (a) is annexed to the hours and minutes, it implies that they are to be added he time of High Water at London; and (s) annexed shows that the hours and minutes here en are to be subtracted, and therefore the time of High Water at such places is before that London Bridge. !stronomical Characters, used Mercury, Venus, & Mars, Aries, Taurus, II Gemini, in this Almanack, explained.-O The Sun, The Moon, Jupiter, Saturn, H Uranus, or the Georgium Sidus, Cancer, N Leo, my Virgo, Libra, m Scorpio, Sagittarius, Capricornus, Aquarius, Pisces, 8 Moon's Ascending Node, & Conjunction, Quartile. SOLAR AND LUNAR ECLIPSES IN 1847.* WITHIN the revolution of this year there will be four eclipses, two of the Sun and two of the Moon. The first is a partial eclipse of the Moon, in the night of Wednesday, the 31st of March; and will be visible, if clouds interfere not, throughout the island of Great Britain, Ireland, &c.: for I find at the time of the first contact of the Moon with the dark shadow of the Earth, or, in other words, of the beginning of the eclipse, the Moon will be vertical in latitude south 4° 46, and longitude east from Greenwich 54° 29'; and at the end of the eclipse she will be in the zenith, in latitude south 5° 5', and longitude east 23° 51'. From these calculations the extent of the visibility of this eclipse may be easily traced on a terrestrial globe. The following type, adapted for Greenwich, will serve, without perceptible error, the whole of Great Britain and Ireland: at Greenwich the eclipse will begin at 24 minutes past 8, in the evening; the middle at 27 minutes past 9, when the Moon will be eclipsed on the north limb 3 dig. 27'; and the eclipse will terminate at 30 minutes after 10 o'clock at night. Note. At York this eclipse will begin and end 4 minutes, and at Liverpool 12 minutes, earlier than at Greenwich, The second is a total eclipse of the Sun, on Thursday, the 15th of April, in the morning, but invisible to us. The ecliptical conjunction of the Sun and Moo will take place at 22 minutes past 6 A.M. The eclipse will be visible at the Cape of Good Hope, and will extend to Borneo, Australia, &c. The third is a partial eclipse of the Moon, on Friday, the 24th of September commencing at 27 minutes past 1, and ending at 40 minutes after 3, in the afte noon, consequently invisible in these parts, the Moon being below our horiz during the whole time of the eclipse. It will be visible to the eastern parts of the world, such as Hindostan, Thibet, China, Japan, &c. The fourth, and last, is a very large and notable eclipse of the Sun, on the morning of Saturday, the 9th of October. It will be visible throughout Gre Britain and Ireland; and for the southern parts of England will exceed in mag tude any Solar eclipse there since the 1st of April, 1764. The annexed is a ty These Eclipses, and all the rest of the Astronomical Computations in this Almanack, made for the meridian and latitude of the Royal Observatory, Greenwich, except other expressed. of the eclipse, at the time of the greatest obscuration (which will be annular) at Greenwich. The northern boundary of the annular appearance in this famous eclipse will mmence in Great Britain, not far from Cardigan, in Wales, will pass through the cinity of Hereford, Gloucester, Cheltenham, and Oxford, and from thence to ondon and Greenwich: in the same direction it will pass very near Canterbury, d go off to sea, between Margate and Dover, in the neighbourhood of Deal. he central eclipse will enter our island on the coast of Cornwall, and will pass by aunceston, Tavistock, Ashburton, and Torbay, on the Devonshire shore, to the nglish Channel, and across to France. At all these places, I find, at the ne of the middle of the eclipse, the Sun's border will surround the Moon's dark dy with equal breadth on every side, like a brilliant ring, of about half a digit breadth, beautiful to behold. No. 1 represents the appearance of the Sun at the time of the greater obscuraat Edinburgh; No. 2, at Preston, in Lancashire; and No. 3, at Torbay, in nwall. The eclipse begins at Edinburgh at 7 minutes past 6; middle minutes past 7, and ends at 36 minutes past 8. The eclipse begins at Preston bout 9 minutes past 6; middle 20 minutes past 7, and ends 38 minutes after 8. Torbay the eclipse begins at 56 minutes past 5; sun rises 14 minutes past 6, psed; annular appearance begins 7 minutes past 7; middle, 10 minutes past annular appearance ends 13 minutes past 7; end of the eclipse, 31 minutes r 8.-Note. The Sun will also rise eclipsed at Edinburgh and Preston. FAIR AND FOUL WEATHER TABLE. IMPROVED AND ILLUSTRATED BY THE LATE REV. ADAM CLARKE, LL.D. THIS Table, and the acompanying Remarks, are the result of many years' actual observation: the whole being constructed on a due consideration of the attraction of the Sun and Moon in their several positions respecting the Earth; and will, by simple inspection, show the observer what kind of weather will most probably follow the entrance of the Moon into any of her Quarters, and that so near the truth as to be seldom or never found to fail. MOON. If the New Moon,-the First Quarter,- Between 2 and 4 Morning Cold, with frequent Snow and Stormy. showers Wind and Rain Fair, if Wind N.W. Rainy, if S. or S. W. Ditto 1. The nearer the time of the Moon's Change, First Quarter, Full, and Last Quarter, is to MIDNIGHT, the fairer will the weather be during the seven days following. 2. The space for this calculation occupies from ten at night till two next morning. 3. The nearer to MID-DAY, or NOON, these phases of the MOON happen, the more f or wet the weather may be expected during the next seven days. 4. The space of this calculation occupies from ten in the forenoon to two in the aftert903These observations refer principally to Summer, though they affect Spring and Autumn Bear in the same ratio. 5. The Moon's Change, First Quarter, Full, and Last Quarter, happening during six of afternoon hours, i. e., from four to ten, may be followed by fair weather: but this is most dependent on the WIND, as it is noted in the Table. 6. Though the weather, from a variety of irregular causes, is more uncertain in the lat part of Autumn, the whole of Winter, and the beginning of Spring, yet, in the main, the a observations will apply to those periods also. ECLIPSES OF JUPITER'S SATELLITES, MEAN TIME, 1847. Easter Day. Dominical Letter Golden Number Epact Solar Cycle Roman Indiction CHRONOLOGICAL NOTES, 1847. September 11, 1847, the year 5608 of the de April 4 Julian Period 5 8 December 9, 1847, the year 194 |