174 OUTLINES OF NATURAL PHILOSOPHY. 



173. When the elements of the orbit are found 

 from observation, at periods considerably dis- 

 tant from one another, the line of the apsidefc 

 of each of the planets is discovered to have a 

 slow motion forward. 



LA LANDE, 1309, &c. 



The Elements of the Orbits of the different Planets 

 are given in the annexed tables. 



I. 





II. 



