Mr. South on Astronomical Phenomena. 287 



Knowing that to the various forms of time, under which as- 

 tronomical notices are given, we may attribute the loss of many 

 a valuable observation, the phenomena here registered are re- 

 duced to sidereal time. 



The Right Ascension and Declination of the Sun, Moon, Planets 

 and Stars, are given to the nearest minute. 



The Sun's place is taken from the Nautical Almanac. — The places 

 of Mercury, Venus and the Georgian, are computed from data, 

 found in the same work ; those of Mars, Jupiter and Saturn, are 

 taken from Schumacher's Ephemeris; whilst that of Juno is derived 

 from tables published by Mr. Groombridge. 



The right ascension of the Moon, is computed from the nautical, 

 as is also her Declination, corrections for parallax and refraction 

 havin°- been applied to it ; the ephemeris is continued as far 

 through each lunation, as it is probable she will be observed. 



The differential stars, and their places, are taken from Schuma- 

 cher's Astronomische Nachrichten. 



The eclipses of Jupiter's Satellites are computed from the 

 Nautical Almanac, the corresponding mean time is also given; 

 to the notice of each eclipse the distance of the planet from his 

 opposition is annexed, so that by a reference to the diagrams pub- 

 lished in this Journal, the observer will instantly be informed 

 where the Immersion or Emersion will lake place.— The time is 

 accurate to the nearest minute. 



The Occultations of Stars by the Moon, and the consequent 

 Emersions, are derived from the list published in the Philosophical 

 Magazine,— because, however, our clocks shew right ascensions 

 in time, not in space, the degrees and minutes there given, are 

 here converted into time— and as for the purpose of identifying a 

 star, it is generally advisable, that its place should be brought up 

 to the period of observation nearly ; this I have also done ;— and 

 as apparent time in an observatory is useless, till converted into 

 sidereal or mean, it is here altogether rejected, and the two latter 

 are substituted in its stead,— the calculations are considered 

 accurate, to two or three minutes of time. 



For the original list, wc are obliged to Messrs. Inghirami 



