358 



very reasonabiy be doubted whether there be really any essen- 

 tial physical dislinction bctwecn nebulae and Clusters ot stars.« 



2' (321.) Dr. ?)(ic^ol, ^^rofetTor ber 3(|lrouomte ju ©(a^goiv, l)at 

 biefeii, auö Castle Parsonsiown batirteu 33rtef in feinen Thoughts 

 ofsome Import ant points relating to the System ol 

 the World 1846 p. 55 befaunt gemacht: »In accordance with 

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

 nation of Orion, I Ihink, I may safely say, Ihat there can be 

 little, if any doubt as to the resolvability ot the Nebula. Since 

 you left US, there was not a Single night when, in absence of 

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

 ihan half the magnifying power the speculum bears: still \vc 

 Lould plainly see that all about the trapezium is a mass of 

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

 exhibiting the characteristics of resolvability strongly markcd.u 



^« {<B. 322.) 33eröU Edinb. Review Vol. 87. 1S48 p. 18G. 



'' (@. 323.) .^oömoö a3b. 111. @. 183 unb 212 (Oinm. 64). 



■'" (®. 323.) .iloömü>^ 5bb. 111. 8. 44. 



" (6. 323.) DteJUton, Philos. Nai. Principia raathe- 

 malica 1760 T. 111. p. 671. 



'' (©. 323.) .^oömoö 23t». 1. <B. 146. 



'' (@. 323.) .^oömo^ ^b. I. a 412 (3inm. 66). 



'* (@. 323.) eil- 3ol)n .^erfc^el, (2apreife § 109-111. 



" (e. 325.) 2)ie '^uubamente biefer ^lufjäljUiuij ertjeifcfcen 

 ()ier eine erlänteruna. Die brei eatalo^je üon .^erfdjel bem ^ater 

 entI)aUen 2500 Objecte, ndmlid) 2303 Tiebei «nb 197 @tern()aufen 

 (9)i abier, 2(flr. e. 448). 3n ber fpäteren, iveit genaneren g)iu= 

 flerung bed eol)ne»^ (Observation s of Nebulae and Clus- 

 ters of stars made at Slough with a twenty-feet Reflector 

 between the years 1825 and 1833, in beu Philo sophical 

 Transactions of ihe Royal Society of London for the 

 year 1833 p. 365—181) luurben biefe ^a()len veränbert. Oi)n- 

 9efal)r 1800 Cbjecte waren ibenttfd) mit benen ber brei früljeren 

 Kataloge ; brci^ bit^ iuerl)unbert aber lunrben vorläufig aii^^e-. 

 fd)lo|Ten, unb mel)r alö fitnff)unbert neu entbecfte in Oiectafcenfion 

 unb :Decliuation beftimmt (@trnüe, Astr. stellaire p. 48). 

 S)a^ nör blicke SBerjeic^nip ent()ä(t 152 @ternl)anfeu, fclglic^ 

 2307 — 152 — 2155 9(ebelflecfe; aber unter ben 9cummern be^ 



