OF ARTS AND SCIENCES. 



31 



magnitudes and the number of clianges of sign, but the orbit is open 

 to a criticism of a wholly dift'erent kind. Its serai-axis major is only 

 3.00, and as the eccentricity is 0.500, the distance of the centres at 

 peri-astroii is 1.775. Now as the radius of tlie star is 1.000 and of 

 the satellite .764, it is evident that, although they would not actually 



TABLE XL — Comparison of Orbits. 



