CXXV1 NOTES. 



des points situes dans la partie circulaire du disque de la planete." (Arago, 

 Manuscripts of 1847). 



C 560 ) p. 350. "Wilhelm Beer und Madler, Beitrage zur physischen Kennt- 

 niss der himmlischen Korper, S. 148. The so-called satellite, or moon 

 of Venus, which Fontana, Dominique Cassini, and Short, thought they had 

 recognised, for which Lambert computed tables, and which was said to have 

 been seen at Crefeld (Berliner Jahrbuch, 1778, S. 186), fully three hours 

 after the emersion of Venus, in the middle of the Sun's disk, belongs to the 

 astronomical myths of an uncritical period. 



( 561 ) p. 350. Philos. Transact. 1795, Vol. Ixxxvi. p. 214. 



( 562 ) p. 352. Kosmos, Bd. iii. S. 103 and 133, Aum. 73 ; Eiigl. ed. p. 84, 

 and Note 162. 



( 563 ) p. 352. "La lumiere de la Luneestjaune, tandis que celle de Venus 

 est blanche. Pendant le jour la Lune parait blanche parcequ'a la lumiere 

 du disque lunaire se mele la lumiere bleue de cette partie de 1'atmosphere 

 que la lumiere jaune de la Lune traverse." (Arago, in MSS. of 1847.) The 

 most refrangible colours in the spectrum, those from blue to violet, unite in 

 order to form white with their complementary colours, the less refrangible 

 ones, from red to green. (Kosmos, Bd. iii. S. 309, Anm. 19 ; Engl. ed. p. 

 Ixxvii. Note 347.) 



(^ p. 353. Forbes on the Refraction and Polarisation of Heat, in the 

 Transactions of the lloyal Soc. of Edinburgh, Vol. xiii. 1836, p. 131. 



( 565 ) p. 354. Lettre de Mr. Melloni u Mr. Arago sur la Puissance calori- 

 fique de la Lumiere de la Lune, in the Comptes rendus, T. xxii. 1846, p. 

 541 544. Compare also, for the historical statements, the " Jahresbericht 

 der physikalischen Gesellschaft zu Berlin," Bd. ii. S. 272. It has always ap- 

 peared to me rather remarkable that, from the earliest times, when warmth was 

 only determined by the feelings, the Moon first gave rise to the idea that light 

 arid warmth might be found separated. Among the Indians, the Moon, re- 

 garded as the King of the Stars, is surnamed in Sanscrit the " cold" ('sitaia, 

 hima) and also the cold-darting or cold-radiating (himan'su) ; while the Sun, 

 with its many rays depicted as hands, is termed the " Creator of Heat" 

 (nidaghakara). The spots on the Moon, in which western nations thought 

 they could make out a face, represent, in the view of the Indians, a roebuck 

 or a hare : hence the Sanscrit names of the Moon " Roe-bearer" (mrigadhara) 

 or " Hare-bearer" (sa'sabhrit). (Schutz, " Five Cantos of the Bhatti-Kavya," 

 1837, S. 19 23.) The Greeks complained " that the light of the Sun, re- 

 flected by the Moon, loses all heat, so that only feeble remains thereof come 



