102 



" The following short table of the photometric quantities 

 of seventeen stars of the first magnitude (as obtained from 

 the photometric scale of magnitudes) may not be devoid of 

 interest :" 



Sirius 4-165 



7i Argus 



Canopus 2-041 



aCentauri 1-000 



Arcturus 0-718 



Rigel 0-661 



Capella 0-510 



aLyrae 0-510 



Procyon 0-510 



" The following is the photometric quantity of stars strict- 

 ly belonging to the 1st, 2d 6th magnitudes, in which 



the quantity of the light of a Centauri is regarded as the 

 unit :" 



Magnitude on 

 the vulgar scale. 



1-00 

 2-00 

 3-00 



Quantity 

 of light 



0-500 

 0-172 

 0-086 



Magnitude on 

 the vulgar scale. 



4-00 

 5-00 

 6-00 



Quantity 

 of light. 



0-051 

 0-034 

 0-024 



