NOTES. kxxix 



when examined under the great light of Lord Rosse's reflector, or the exqui- 

 site defining power of the great achromatic at Cambridge, U.S., is evidently 

 perceived to consist of clustering stars. There can, therefore, be very little 

 doubt as to the whole consisting of stars, too minute to be discerned indivi- 

 dually, even with these powerful aids, but which become visible as points of 

 light when closely adjacent in the more crowded parts" (Outlines, p. 609). 

 W. C. Bond, who employed a 23-foot refractor, furnished with a 14-inch 

 object glass, says : " There is a great diminution of light in the interior of 

 the trapezium, but no suspicion of a star (Mem. of the Amer. Acad., new 

 series, Vol. iii. p. 93). 



( 42G ) p. 243. Phil. Trans, for the year 1811, Vol. ci. p. 324. 

 C 127 ) p. 243. Transact, of the Royal Soc. of Edinburgh, Vol. xvi. 1849, 

 Part 4, p. 445. 



( 428 ) p. 243. Kosmos, Bd. iii. S. 251-254 ; Eng. ed. p. 171-174. 

 f 429 ) p. 243. Cape Observations, 70-90, PI. ix. ; Outlines, 887, PL 

 iv. fig. 2. 



O p. 244. Kosmos, Bd. ii. S. 146 ; Eng. ed. p. 112. 

 C 431 ) p. 244. Cape Observations, 24, PI. i. fig. 1, No. 3721 of the 

 Cat. ; Outlines, 888. 



( 432 ) p. 244. Nebula in Cygnus ; partially in R. A. 20 h 49 m , N.P. D. 58 

 27' (Outlines, 891). Compare Cat. of 1833, No. 2092, PI. xi. fig. 34. 



( m ) p. 245. Compare the drawings in PI. ii. fig. 2, with PI. v. in the 

 " Thoughts on some Important Points relating to the System of the World," 

 1846 (by Dr. Nichol, Professor of Astronomy at Glasgow), p. 22. Sir John 

 Herschel, in his Outlines of Astronomy, p. 607, says " Lord Rosse describes 

 and figures this nebula as resolved into numerous stars with intermixed ne- 

 bula" 



C 4 * 4 ) p. 245. Kosmos, Bd. i. S. 157 and 415, Anm. 81 (Eng. ed. p. 141 

 and xxxviii.), where the nebula No. 1622 is called a " brother-system." 



C 435 )^. 245. Report of the 15th Meeting of the British Association for 

 the Advancement of Science, Notices, p. 4 ; Nicbol, Thoughts, p. 23 (com- 

 pare PL ii. tig. 1 with PI. vi.) In the Outlines, 882, it is said, " the 

 whole, if not clearly resolved into stars, has a resolvable character which 

 evidently indicates its composition." 



C 36 ) p. 246. Kosmos, Bd. i. S. 88 and 387 (Anm. 2) ; Eng. ed. p. 76 

 and Note 32. 



(") p. 246. Lacaille, in the Me'm. de TAcad. annee 1755, p. 195. It 

 is objectionable to apply, as Horner and Littrow have done, the name of 

 " Magellanic Spots or Cape-clouds" to the coal-sacks. 



