358 



vcrj' reasoiiably be doublod wliclhcr liiere be really any csscn- 

 lial physical dislinclion belwcen nebulac and Clusters ol slars.« 



*' (321.) Dr. 9(icl)ol, <))rofe(for ber 3{ftroncmie ju ©la-JgDU», l)at 

 liefen, «u^ Castle Parsoiisiown btttirteu 95rief tu feinen Thoughts 

 f s o in e i m p r t a II t p o i n t s r e 1 a t i n g l o t h c System o i 

 the World 1846 p. 55 befannt gemacl)t: »In accordance with 

 ray promise of communicating to you ihe result of our exami- 

 nalion of Orion, I think, I may safeiy say, Ihal therc can be 

 little, ii any doubt as to the resolvabiiity of the Nebula. Since 

 you leM us, Ihere was not a single night when, in abscnce of 

 the moon, the air was fine enough to admit of our using more 

 than half the magnifying power the speculuni bears: still we 

 could plainly see that all about the liapeziuin is a mass of 

 Stars; the rest of the nebula also abounding with slars and 

 exhibiting the characteristics of resolvabiiity strongly marked.« 



'' (@. 322.) ^ergl. Edinb. Review Vol. 87. 1848 p. 186. 



'^ (©. 323.) Äoemoö 93b. 111. ®. 183 unb 212 (Otnin. 84). 



'" (@. 323.) Äoönio^ 5i3b. 111. @. 44. 



*' (@. 323.) 5U'lvron, Philos. Nat. Principia malhe- 

 malica 1760 T. 111. p. 671. 



" (©. 323.) .Slo^moö 93b. I. @. 146. 



'' (@. 323.) Äoöniüö 95b. 1. @. 412 (Stiini. 66). 



'' (@. 323.) @ii- 3otm 3?errc^el, (Sapreife § 109-111. 



" (@. 325.) 2>ie Jimbanieiite biefer ^2{ufjal)lun9 erljetfcten 

 Ijier eine erlauteruna. Sie brei SfltalDjje »on J>?erfd}el bem S8atex 

 entl)alten 2500 Objecte, mmüd) 2303 ^Icebel uiib 197 @rer»l)aiifen 

 (9)iabler, 2(ftr. ©. 448). 3» ^^^ fpatereii, weit öeuauereii 5?iu^ 

 fterung bi^ eol)aeö (Observation s of Mebulae and Clus- 

 ters of Stars made at Slough with a iwenty-feet Refleclor 

 between the years 1823 aud 1833, in beu Phil o sophica 1 

 Transactions of the Royal Society of London for the 

 year 1833 p. 365 — 481) antrben biefi j?al)(eit veranbert. Oljiu 

 gefaljf 1800 £?biecte waren tbenttfd> mit benen ber brei friiOertii 

 (Jatttloge; brei-- bt^ üterl)unbert aber würben vorläufig aw^^e- 

 fcf)loffen, unb nieljr a{6 fiinfl)unbert neu entbecfte in Oxecrafcenfion 

 unb 2)eclination befiinimt (@truue, Astr. siellaire p. 48). 

 5)aö nörbUd)e SSerjeic^nif entl)dlt 152 ©tern^aufea, fplglid? 

 2307 — 152 = 2155 ^tebelflecfe; aber unter ben ^(Utnniern beö 



