40 Hiftory of AJlronomy fqr the Year 1799. 



companied with other obfervations of thofe famous countries 

 which gave birth to aftronomy, and where it has been for- 

 gotten for 2000 years. 



C. Caftera has oiven us, in two volumes 8vo, a tranflation 

 of the curious travels of Mungo Park into the interior parts 

 of Africa; and we at length know the real direftion of the 

 Senegal and the Niger, of which, after fix months refearch, 

 I made only one river in my Memoir on Africa, printed 

 among thofe of the Academy of Sciences for 1790, the laft 

 volume of that collection. 



C. Montucla has given a new edition of his Hiftory of the 

 Mathematics, enlarged by one-half, and in which aftro- 

 nomy occupies a confiderable place. 



In the National Library there has been found a manu- 

 fcript on Optics by Ptolemy, which was fuppofed to have 

 been loft. It is a Latin tranflation from the Arabic. 

 C. Cauffin, by whom it was found, propofes to make 

 known this valuable manufcript. 



M. Bode has fent us from Berlin the remainder of his 

 large and beautiful charts which reprefent the hea^'ens. The 

 great number of ftars with which I furniflied him, gave me 

 a right to new conftellations. To fill up the vacant fpaces 

 he had put thirty-three animals in the heavens ; and I have 

 added a thirty-fourth, viz. the Cat, on account of that charm- 

 ing poem, of which Dcllierbiers has publiflied fome frag- 

 ments. This new conllcllationof the Cat is between Hydra 

 and the Ship. It has been already engraved in Germany, and 

 will be inferted in M. Bode's new Celeftial Atlas, of which 

 he has publiftied tv.elve flieets. 



M. Hobert and Ideler, of Berlin, have puLliflicd Logarith- 

 mic Tables for the decimal fines, which will facilitate aftro- 

 nomical calculations, until the more extenfive tables, whicii 

 C. Proney caufed to be calculated at the Bureau dti Cadajire, 

 and which began to be printed fome years ago, are finiihed. 



The ftereotype edition of Lotrarithmic Tables, publifljcd 

 four years ago by Didot and Callet, which ought at length 

 to be free from all faults, has been correfted on the plates, 

 and there is reafon to think that they approach very near to 

 perfeclioix,. 



6 We 



