576 



collision ot Mars wilh a large comel in i315 or 1316, that Ihe 

 comet was ihereby broken inlo three parls, whosc or bits (il 

 may be presunied) received oven thcii their prescnt rorm; viz., 

 that slill presented by Uie comets of 1812, 1815 and 18i6, which 

 arc iragments ot thc dissevered comet.« 



^ (S. 559.) Sav'Uce, Expos, du Syst. du Monde (ed. 

 1824) p. 414. 



* (@. 559.) Ucber (Someteii im ^laturöemalbe f. .Äo^moö 

 m. 1. e. 105—120 «nb 389—393 5j(uni. 12-27. 



^ (@. 560.) 3u fitbeii I)albeu 3^^)^t)W"i'^rteii uoii 1500 btö 

 1850 finb sufammeu 52; einjelii in ber Oieiljeufolge öon ftebeii ^ku 

 c^en ^^periobe«: 13, 10, 2, 10, 4, 4 unb 9, bem bleuen 3(uge 

 fic^tbare (Kometen in Suropa erfdjienen. J>>ier folgen bie ein: 

 seinen ^aijve: 



