PHYSICAL AND LITERARY. 105 



Art. VL 



A Solution of Kepler'^ Problem -, by Matthew 

 • Stewart, Frefeffor of Mathematics in thi 

 XJniverfity o/' Edinburgh *. 



THO* the problem proppfed by the cele- 

 brated Kepler has been folved by feve- 

 ral Mathematicians of great note : yet, as 

 this is of confiderable ufe in aftronomy, it is 

 hoped the following folution may be agree- 

 able to fome J as it requires a lefs degree of 

 knowledge in the more difficult parts of Ma- 

 thematics, than the other methods do. 



PROP. L rab.Y. Fig. i. 



Let there be a ftreight line AB, and 

 CD a portion of a curve wh oily- 

 concave towards AB, and draw AC, 

 BD parallel to each other, meeting 

 the curve in C, D ; let C E, a tan- 

 VoL. II. O gent 



• December 4, iJSS* 



