OUTLINES OF NATURAL PHILOSOPHY. 



%63. The Tables of the Moon's motions in the 

 state to which they are now brought, contain 

 28 equations for the longitude of the Moon j 

 12 for the latitude, and 13 for the horizontal 

 parallax, or the distance of the Moon from the 

 Earth ; and their greatest probable error does 

 not exceed 12 seconds. 



It is very much to the introduction of the equation 

 of the period of 85 years, which nobody before 

 LA PLACE had discovered, that the superior accu- 

 racy of the New Tables is to be ascribed. 



The observations at Greenwich have afforded the 

 data from which the theory of gravity, and the 

 integral calculus have extracted these memorable 

 results. 



SECT, 



