100 



C0SMO3, 



progresses in order of the squares, 1, Itli, 1th, y^^th . . . He likewis* 

 treats of geometric progressions, as, for instance, 1, 1, ith, ith, . » . or 1, 



Id, 1th, -^jth The gradations employed by yourself in your ob 



servations under the equator, during your travels in America, are ar- 

 ranged iu a kind of arithmetical progression {Recueil d^Observ. Astron., 

 vol. i., p. Ixxi., and Schumacher's Astron. Nadir., No. 374). These 

 scales, however, correspond less closely than the photometric scale of 

 progression (by squares) with the vulgar scale. In the following table 

 the 190 stars have been given from the Outlines, without reference to 

 their declination, whether southern or northern, being arranged solely 

 ia accordance with their magnitudes." 



Ijist of 190 stars from the first to the third magyiitude, arranged accord- 

 ing to the determinations of Sir John Herschcl, giving the ordinary 

 magnitudes with greater accuracy, and likewise the magnitudes in ac- 

 cordance with his proposed photornctric classification : 



Stars of the First Magnitude. 



Star. 



Sirius 



Argus (Var.) 

 Canopus 



a 



Magnitude. 



Vuls. 



008 



0-29 



Centauri 0-59 



Arctnrus 

 Rigel ... 

 Capella.. 



Lyra3 



Procyon . 



077 



82 

 10 

 10 

 10 



Phot 



0-49 



0-70 



100 



MS 



1-23 



1-4 



1-4 



1-4 



Star. 



Orionis 



Eridani 



Aldebaran 

 Centauri.. 



Crucis 



Antares .. 



a AquilES ... 



Spica 



Blnsiiitiidt'. 



Vuls- 



10 



109 



11 



M7 



1-2 



1-2 



1-28 



1-38 



Phot. 



1-43 



1-50 



1-5 



1-58 



1-6 



1-6 



1-69 



1-79 



Stars of the Second Magnitude. 



Star. 



Fomalhaut . 



Crncis 



Pollux 



Regains 



Gruis 



Crucis 



Orionis 



Canis 



Scorpii 



Cygni 



Castor 



e Ursae (Var.) 

 a Ursaj (Var.) 



C Orionis 



3 Argus 



a Persei 



ArgQs 



3 



Argus 



Ursffi(Var.) 

 Orionis 



Magn 



1 54 



1-57 



1-6 



1-6 



1-66 



1-73 



1-84 



1-86 



1-87 



1 90 

 1-94 

 1-95 

 1-96 

 201 

 203 

 207 



2 08 

 2-18 

 218 

 2-18 



itude. 



Star. 



Pilot 



l-95|a 



1-98 



20 



20 



2 07 



214 



2 25 



2-27 



2-28 



2-31 



2 35 



2 36 



2-37 



2-42 



2-44 



2-48 (3 



2-49 



2-59 



2-59 



259 



Tiiang austr. 

 Sagittarii ... 



Tauri 



Polaris 



Scorpii 



HydrsB 



Canis 



Pavonis 



Leonis 



Gruis 



Arietis 



Sagittarii 



Argus 



Ursffi 



Andromedae. 



Ceti 



Argus 



Aurigae 



Andromedae . 



