246 A NEW and UNIVERSAL SOLUTION, Vc. 



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

 the radius vector of the orbit. The formula e = P X — . x 



S ' I +KX 2 



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



_ i) 



For, if we make tan u zr x X ^/\ — tan - x vA j we mall have 



cof s u — — j, and = i -\- * 2 ', and, therefore, alfo 



1 + X * cof 2 - 



2 



g s —fT~ X p, whence g may be found. 



X. 



