( 2°3 ) 
€i From E, one of the Foci of the Ellipfe, draw the 
“ Line E T, fo that it may, with the Axis B C, 
iC make the Angle BET equal to the Diflance given 
<c from the Pole to the Zenith. From the other Focus 
“ F, with the Diflance B C equal to the Axis, draw 
“ an Arc, to cut the Line E T at T. I fay, that the 
* Line F T, drawn from the Point T to the Focus 
“ F, will cut the Ellipfe at the Point FT j which Point 
ct is fuch, that the Diflance of the Pole, from its 
“ Zenith, contains the given Number of Degrees. 
“DEMONSTRATION. 
“ From the Point H, raife H Z, perpendicular to 
“ the Ellipfe which will pafs through the Zenith Z j 
“ and, being produc’d inwards, will meet the Axis of 
“ the Earth at O, and (by the Property of the Ellipfe) 
c: divide the Angle EHF into two equal Parts. From 
<c the Point H, draw like wife H P, parallel to the Axis 
c '■ B C, and dire&ed to the Pole P, fuppos’d at an infi- 
“ nite Diflance. The Angle P H Z, or P O Z, mea- 
“ fures the Diflance, from the Pole to the Zenith, of 
<c an Inhabitant dwelling upon the Earth at the Point 
“ H. FT is equal to the Axis B C, by Conflruction ^ 
* but, by the Property of the Ellipfe, B C is equal to 
“ E H plus H F j taking away from both FH, which 
is common, E H will remain equal to H T. The 
“ Angles E T H, TEH, will therefore be equal, 
“ and, confequently, each of them will be half of the 
“ external Angle EHF; but the Angle E H O is 
“ like wife equal to half of the Angle EHF; there- 
“ fore the Angles T E H, E H O, will be equal to 
a one another ^ and, confequently, the Lines E F and 
“HO will be parallel to one another ; and the Angle 
“ P O Z, which meafures the Diflance from the Pole 
G g 2 “ to 
