144 Intelligence and Miscellaneous Articles, 



place of decimals,) for mean noon, and mean midnight. There is also 

 given the mean time of the moon's upper and lower culmination, (to 

 the tenth of a minute in time), as well as her right ascension and de- 

 clination (to the tenth of a minute in space) ; together with the time 

 of her rising and setting, the time of her changes, and the time when 

 she is in perigee or apogee. > 



At the end of this joint ephemeris of the sun and moon, there is 

 given for every tenth day of the year, the apparent obliquity of the 

 ecliptic, the parallax of the sun, the aberration, and the equation of 

 the equinoctial points (each to two places of decimals) ; together with 

 the place of the moon's node (to the nearest tenth of a minute). 



Then follows an ephemeris of each of the planets, including the 

 four newly discovered ones. The places of Mercury and Venus are 

 computed for mean time at noon for every second day, and the re- 

 maining planets for mean time at midnight for every fourth day of 

 the year. The columns contain the heliocentric longitude and lati- 

 tude of the seven principal planets (to one place of decimals in the 

 seconds), the geocentric right ascension (to two places of decimals), 

 and the geocentric declination (to one place of decimals) j the radius 

 vector, and the logarithm of the distance from the earth (each to seven, 

 places of decimals) ; together with the time of their rising, setting, 

 and passing the meridian. The computations of the four newly dis- 

 covered planets are not so minute, except at the time of their oppo- 

 sition 3 for which period a separate ephemeris is given of the position 

 of the planet for every day. 



We have next an ephemeris of the time of the eclipses of Jupiter's 

 satellites (to one place of decimals) -, to which is subjoined (for each 

 satellite) a table for computing with the greatest accuracy, not only 

 the configurations at any moment, but also the position of the satellite 

 with respect to Jupiter at the time of its immersion or emersion. At 

 the end of these tables, we are presented with another ephemeris 

 (computed for every fortieth day) of the apparent position and mag- 

 nitude of Saturn's ring. 



After this comes a table of the mean places (for 1830) of 45 prin- 

 cipal stars 5 the right ascensions to three places of decimals, and the 

 declinations to two places of decimals. From these are computed and 

 given for every tenth day of the year, the apparent places of the same 

 stars (to two places of decimals), with their differences. And we have 

 also the apparent places, for every day in the year, of a and $ Ursce 

 Minoris. To the whole of which are annexed formulae for determining 

 the amount of the diurnal aberration. Following these is given a 

 table of the constants A, B, C, D, for every tenth day of the year, for 

 the purpose of determining the apparent places of any other stars. 

 It should however be remarked, that these letters do not indicate 

 precisely the same quantities as are so designated in the catalogue of 

 the Astronomical Society : and it should also be noted that the num- 

 bers are adapted to sidereal time. There is however another table 

 subjoined, for the use of those who are disposed to adopt mean solar 

 time in these computations. 



Next follows a particular account of all the solar and lunar eclipses 



that 



