Hifiorj of AjlYomniy fof the Year i8o2. 1 79 



We have received the Ephemerides of Vienna for 1803, 

 which contains the new tables of the moon by INI. Trief- 

 necker; but it is evident that he has feen thofe of M. Burg 

 already mentioned : alfo the Ephemerides of Berlin for iJio^, 

 where M. Bode has coUeded 170 pages of obfcrvations ou 

 the new planets, and on other important points in all parts 

 of Gcrnianv. 



M. Schroeter has publiflied a continuation of his obferva- 

 tlons on the fpots of the moon, in a large volume hi quarto, 

 entitled Selenotopograph\fche Fragjnente \ that is to fay, To- 

 pographical Fragment-; rcfpctting the Moon : to ferve for 

 givmg a correct idea of the furface of that luminary, and the 

 changes which have taken place in it, in its atmofphere and 

 in its mountains ; by Dr. F. F. Schroeter, grand bailiff of 

 Lilienthal, near Bremen. Part ii. 1803. pp.565. 410. with 

 32 plates. Gcittingen. 



The firfl. part appeared in 1791: we publiflied two extraSs 

 from it, which (how with what patience and minutenefs this 

 able aftronomcr has examined the furface of the moon. 



Thefe new obfervations were made with the fame care for 

 twelve years, and with optical inftruments of the greateil 

 power, (two telefcopes, one of 13 and the other of 27 feet.) 

 They entitle him to the gratitude of aftronomers, as they will 

 ferve them as a bafe and term of comparifon in their future 

 refearches refpefting the changes that may take place at the 

 lurface of the moon. He has obferved mountains which rife 

 to the height of 4000 toifes, and others to the height ol 2400. 

 M. Schroeter has alio determined, that the part of the lunar 

 atmofphere which is fufficiently denfe to produce the crepuf- 

 cula, is 300 toiles in height. 



The author has alfo feen objefts which he did not fee in 

 the courle of his preceding obfervations, and which on the 

 firft view might be afcribed to changes that have taken place 

 at the furfiice of the moon : but he remarks, with the referve 

 of an able obferver, that the particular (late of the lunar 

 atmofphere mav have concealed thefc objedls at the time of 

 his firft obfervations. 



Dr. Henzenberg, of Hamburgh, between the months of 

 July and 06lobcr 1802, maile thinv-one experiments on the 

 fall of hollies from the Iteeple of St. Michael, which is 235 

 Paris feet in height: and found that heavy bodies do not tall 

 vertically; there are four lines of declination towards the call, 

 and 1-5 line towards the foulh. 



M. (iuglielmiiii, of Bologna, found a little more. But all 

 thele experiments lend to prove tlic rotation of the earth. 

 [To be coiitiiiutd- 1 



N 2 XXXU. AV 



