357 



'' {B. 320.) SJer^l. Äo^moö SD. III. o. 81 unb 117 

 (9(iim. 34). 



" (S . 32 1 .) An a c c u n t o f l h e E a r 1 o f R o s s e's g r e a t 

 Tclescope p. 14—17, tvo bie 2iil:e ber im 9}iärj 1845 von 

 Dr. ^TiolniifDU unb ©ir 3«nie^ ©oiitl) aiifdelöfreu ^;)iebel gegeben 

 wirb. »Dr. Robinson could not leave Ihis pari of his subjecl 

 wilhoul calling attention to thc fact, that no real nebula seemed 

 to exist among so many oi Ihese objects chosen without any 

 bias: all appeared to be Clusters of stars, and every addilional 

 one which shall be resolved will be an additional argumenl 

 againsl the existence of any such.« @ c^ u m a d) e r, 9l(lr. 

 ■Dcac^r. Tii>. 536. — 3" ^^"^ Notice sur Ics grands Teles- 

 copcsdeLordüxmautown, aujourd'hui Earl of Rosse 

 (Bibiiotheque universelle de Geneve T. LVII. tSiS p. 

 3i2 — 337) l)ei^t e^ : »Sir James South rappeile quc jamais il 

 n'a vu de represenlations siderales aussi magniflques que Celles 

 que lui offrait I'instrument de Parsonstown; qn'une bonne partie 

 des nebuleuses se presentaient commc des amas ou groupes 

 d'etoiles, tandis que quelques autres, ä ses yeux du moins, 

 n'oirraient aueune apparence de resolulion en etoiles.« 



^^ (@. 321.) Report of the fifteenth Meeting of the Bri- 

 tish Association, held at Cambridge in June 1845, p. 

 XXXVI unb Outlines of Astr. p. 597 unb 598. »By far the 

 major pari«, fatjt @ir 3o[)n J^erfc^el, »probably at least nine 

 tentbs of thc nebulous Contents of the heavens consist of ne- 

 bulae of spherical or elliptical forms, presenting every variety 

 of elongation and central condensation. Of Ihese a great number 

 have been resolved into distant stars (by the Refleclor of the 

 Earl of Rosse), and a vast multitude more have been found to 

 present that mottled appearance. which renders it almost a 

 matter of certainty that an incrcasc of optical power would show 

 them to be sirailarly composed. A not unuatural or unfair in- 

 duction would Iherefore seem to be, that those which resist 

 such resolulion. do so only in consequence of thc sraallness 

 and closeness of the stars of which Ihey consist: that, in short, 

 they are only optically and not physically nebulous. — Although 

 nebulae do exist which even in this powerful telcscope (ofLord 

 Rosse) appear as nebulae, without any sign of resolulion, it may 



