€ Hi/lory ofAfironomy for the Year 1800. 



©f the apogeum, and of the node. The two papers of Burg 

 and Bouvard, which fliared the prize of the Inftitute, contain 

 new determinations of the moon's motion, founded on fo 

 great a number of obfervations, that there is reafon to think 

 that the tables thence refultiiig will never err more than 15 

 or 20 feconds ; that is to fay, one-half or one-third lefs than 

 thofe which JVlafon publiflicd in England. Dr. Malkelyne 

 made him undertake them by deteruiining the co-efficients 

 of 24 equations of the tables of Mayer by a comparifon with 

 thofe of Bradley. But the new refearches are founded on a 

 much greater number of obfervations. 



The equations, which De Laplace found by theory, have 

 added to them a greater degree of perfection, and nothing 

 remains but the latitude, for which a new prize ought to be 

 propofed. 



Burg has calculated 3233 of Malkelyne's obfervations, in 

 order to determine the epoch of the moon. He has again 

 determined alio the 24 equations of the moon as Mafon has 

 done, but with more corre6lnefs. Madame Lavit has had the 

 courage to calculate more than 500 places of the moon for 

 the refearches of Bouvard on the fame fubje<Sl. 



Burckhardt, one of our ableft and moll zealous aftrono- 

 mers, has calculated tables of the moon, according to the 

 new refults of Burg, for the ufe of the aftronomers who have 

 fet out on a diftant expedition. They will perhaps find ihem- 

 felves in fituations when it will be of importance for them to 

 have the longitudes calculated more exa6lly than they are 

 either in the Englifli Nautical Almanack or the French Con- 

 noiffance des Temps, which, beiides, may be exhaufted before 

 th^/ir return. 



The French Board of Longitude has propofed a prize of 

 60C0 francs (250/.) for more perleft tables of the moon, 

 which we (hall foon obtain. This part, therefore, of fo much 

 importance to aftronomy and navigation, which has occupied 

 aftronomers for more than 100 years, is at length terminated 

 m the completed and moft fatisfadory nivinner. 



De Parceval, an able geometer, has terminated a grand 

 analytical theory of the moon, in which he has given exad 



formula; 



