BIBLIOGRAPHY OF HERSCHEL'S WRITINGS. Hlil 



Subject-Index. Puilosoi-hicai, Tkaxsactions. Year. Pngo. 



Section of our sidereal system 17S.", vJ53 



Separating ijower : see Aperture. 



Sequences : of stellar brightness 17'JG 173 



: description of Hekscuel's method for sta rs 17% 181 



Short: 171)2 



Sirius : effect of the Sun's attraction on Siriun L^OO 2'27 



Solar eclipses : see Sun (eclipses. ) 



Solar phenomena : explained 1801 303 



Sources of error considered : see Errors. 



Space-penetrating power : of telescopes 1800 49 



: HIT 319 



Spectra of stars 1 ■^ 14 204 



: see Stars. 



Spectrum: distribution of the light and heat in the spectrum shown by 



curves 1800 439 



Spectrum (atmospheric) of stars 180r> 43 



Spectrum of the Sun: in its relations to Heat. See Heat. 



SiJeculum : dimensions of the 40-foot 1795 403 



Spots on ATars, Jupiter, etc. : see Mars, Jupiter, etc. 



Spurious diameters : of stars 1*^03 345 



Spurious disks : in general 1805 31 



: of celestial and terrestrial objects 18115 40 



: criterion as to whether a disk is real or spurious 1805 53 



Square-shouldered aspect of Saturn 1805 272 



: 180(5 462 



Star-gauges : results given in part 1 ' 84 446 



I 220 



: results given 1' ^ \ to 



( 240 



: (unpublished) 1^517 325 



Star-gauging : defined l*'^^ 445 



Stars of the first magnitude : eleven pairs of them are 60° apart 1796 166 



Stars and nebulas : their connection or disjunction 1791 74-77 



: their connection \J^\\ 249 



Stars : their parallax 1"'-'^ ^^ 



: parallax ; method proposed 1762 87 



: some stars seen best with high powers, and .some witli lower 1782 92 



: drawings of o. Lyrce with various powers 1782 1 



: double stars known in 1782 1782 9/ , 93 



c 100 



: classes of double stars 1782 < to 



( 103 



: may lose light in space 1 ' 6- 1"'* 



: theory of the parallax of double stars 1782 104 



: very small stars usually rod l'^~ 1'*'^ 



: their- diameters ; a Lyrw's was 0".35 1~6- 1^'' 



: drawing of a GeminorMM 1'^^ 1_ 



: lost since Flamsteed l^^^j^ ~^^ 



: changed in brightness since Flamsteed ^"J'^ '^-^ 



: newly come to be visible 1~^^ ^'^ 



_ ^ ^ 1783 257 



• ."■, 1783 259 



: variable 



jgestiou of a method for determining the stellar system to which 

 a given star belongs 



