ON THE SATELLITES OF UKANUS. 107 



now a north declination of 17 degrees, which will con- 

 tinue to increase until 1868 ; and in 1862, the orbits of 

 the satellites will appear sensibly circular. It is evident 

 then that the period is near at hand when this planet can 

 be observed more advantageously than at any former 

 time since the first observations of Sir William Herschel, 

 and it is presumed that astronomers will not fail to im- 

 prove this opportunity to attain all the information 

 within the reach of our instruments, both respecting the 

 physical peculiarities of the primary, and the number and 

 period of its satellites. 



