NOTES. Ixiii 



pays y de estrellas"), reminds us vividly of the impression which must have 

 been made even on the rudest nations, when at the same part of the Earth's 

 surface they first saw rise above the horizon large stars such as those in the 

 feet of the Centaur, the Southern Cross, Eridanus, and the constellation of 

 the Ship, whilst others before familiar disappeared. By the precession of the 

 equinoxes, fixed stars approach and again recede from our view. I have al_ 

 ready remarked, in another place, that 2900 years before our Era, at a time, 

 therefore, when the great pyramid had already stood five hundred years, the 

 constellation of the Southern Cross was 7 above the horizon of the countries 

 bordering on the Baltic Sea. (Compare Kosmos, Bd. i. S. 155, and Bd. ii. 

 S. 333. Eng. ed. Vol. i., p. 139. Vol. ii. p. 293). " Canopus, on the 

 other hand, can never have been visible in the locality of Berlin ; its distance 

 from the South Pole of the Ecliptic is only 14, and it would have required 

 that the distance should have been 1 greater for the star to have ever reached 

 the limit of visibility in our horizon." 



( 23t ) p. 116. Kosmos, Bd. ii. S. 203 (English edition, p. 169170). 



C 232 ) p. 116. Olbers in Schumacher's Jahrb. fur 1840, S. 249; and 

 Kosmos, Bd. iii. S. 151. 



( 233 ) p. 117. Etudes d'Astr. stellaire, Note 74, p. 31. 



( 234 ) p. 117. Outlines of Astr. 785. 



( 235 ) p. 118. Id. 795 and 796; Struve, Etudes d'Astr. stellaire, p. 66 

 73 (also Note 75). 



( 2i6 ) p. 118. Struve, p. 59. Schwink finds in his maps, R. A. 90, 

 2858 stars; R. A. 90 180, 3011 stars; R. A. 180 270, 2688 stars; 

 R. A. 270 360, 3591 stars; total 12,148 stars down to the 7th mag- 

 nitude. 



( 237 ) p. 119. On the circular nebula in the right hand of Perseus (near 

 the sword handle), see Eratosth. Catast. c. 22, p. 51, Schaubach. 



( 238 ) p. 119. Sir John Herschel's Cape Observations, 105, p. 136. 



( 239 ) p. 119. Outlines, 864-869, p. 591596; Madler, Astr. S. 764. 

 ( 24 ) p. 120. Cape Observations, 29, p. 19. 



( 241 ) p. 122. Sir John Herschel says: "A stupendous object, a most 

 magnificent globular cluster completely insulated, upon a ground of the sky 

 perfectly black throughout the whole breadth of the sweep." (Cape, p. 18 

 and 51, PL iii. fig. 1 ; Outlines, 895, p. 615. 



( 242 ) p. 122. Bond, in the Memoirs of the American Academy of Arts and 

 Sciences, new series, Vol. iii. p. 75. 



( 243 ) p. 123. Outlines, 874, p. 601. 



