246 A NEW and UNIVERSAL SOLUTION, i^c. 



trie place, but alfo the dlftance of the comet from the fun, or 



the radius vedtor of the orbit. The formula p zz p X — r~ — ? 



* I + X x' 



found in Art. 1 6. will furnifh a convenient rule for this purpofe : 

 For, if we make tan u zz x X ^\ = tan - x v/'^ ; we fhall have 



2 



cof * u = 



1 + ?i a; 



7, and 



cof^^ 



zz 1 -\- x^ ; and, therefore, alfb 



g =: -jT- X P> ■wlience g may be found. 



X. 



