392 Anstroiiumical Iii/brmation. 



interests of astronomy, has published (in his Astroii. Nach.) 

 a catalogue of all the stars thai are near the moon at the time 

 of her culmination, not only fur the year ISSl, but also for 

 the year 1825, in n!er that distant observatories may take 

 advantage of the method. M. i3onvard at l^aris, i\I. Schu- 

 macher at Altona, .M. 3essel at i'Conigsberg, M. Argelander 

 at \bo, and i)r. '^■truve at l)orpat, aru in the constant tiabit 

 of aiakinij; thes;? ci anparisons and of recording their observa- 

 tions : so that distant observers may, by comparing those iv- 

 sults vith their own observations, easily vleduce the longitude of 

 their observatories. Thib .nethoil of determining the diiRn- 

 ence in the longitudes of two distant oi )servatories is the best 

 that has been hitliertt^ proposed for that purpose; and is ca- 

 pable of considerable accuracy. M. Nicolai, ^I. Vessel, 

 M. Hansen, and 31. Mollweide, have distinguished themselves 

 in the foi'mation of correct formulis and useful tables for de- 

 ducing the recjuirevl results. 



M. Schumacher has jusl published his Astronomical Tables 

 for the year 1824. We understand that they are conducted 

 with the same ability and accuracy, and arranged nearly in 

 the same manner, as the former ones ; but they have not yet 

 reached this country. An English preface will be prefixed; 

 showing the nature and use of the tables. 



M. (.leichenl)ach, so celebrated for his astronomical instru- 

 ments, with v.'hich most of the foreign ol )servatories are fur- 

 nished, has relincjuished this branch of his prcjfession, and 

 remove 1 to Vienna, where he is employed in the Imperial 

 arsenal. Fie has invented a new method for the bt>ring of 

 cannon : but at present it ha^ not succeeded to his wishes. 

 Our own excellent artist, the unrivalled Troughton, still 

 maintains his pre-eminence ; au;l we even anticipate further 

 proofs of his superior talents in the construction of some new 

 circles now in contemplation. Long may he live, to enjo}' the 

 fruits of his well-earned fame ! 



The Astronomische Jalirhucli for 1826 is arrived, in town, 

 and contains the same variety t:>f useful and interesdng intel- 

 ligence for which this work is so much vlistinguished. 



The diird volume of the observations made at the Imperial 

 Observatory at Vienna, by VI. Littrv)w, and the third volume 

 • of the Observations made at Dorpat by \I. Struve, have also 

 reached this country. This latter work contains some very 

 curious and interesting observations and remarks on double 

 stars : to the study of which, this distinguished astronomer 

 has devoted a considerable portion of his time. The same 

 author has also publisheil a list of 795 double stars, arranged 

 in the order of their right ascension : which will be useful to 

 those who are fond of these researches. length 



