( 45 3 )> 
Cafe i. Suppofe the Sun in the Equator, on the 
Day of Obfervation : Fix the Center of the Beam- 
compafs at o Degree (or at the Equator,) and move 
the Point k to the Zenith Diftan.ce (the Comple- 
ment of theAltitude, taken by the ufual Inftruments,) 
and from any Hour, as from C, defcribean Arch of 
a Circle vviththe faid Point, as be (Ex. t.) Suppofe 
eight Hours after, by your Watch, you have another 
Obfervation ; move the Meridian eight Hours far- 
ther, to d, and fix it there ; and with the Zenith 
Diftauce then obferved, deferibe another Arch as* 
e f , the Point where it cuts the former is the Place 
of.Obfervation, and its Diftance taken on the Meri- 
dian from the Equator fhews its Latitude y and the 
Minutes reckoned on the Equator from the Meri- 
dian to C and d (the Times of Obfervation) fhew 
what thofe Hours were. 
Cafe When the Sun has Declination : Fix the 
Center of the Beam-compafs on the Meridian, to 
the proper Degree of Declination for the Day of 
Obfervation, and proceed as before. 
Cafe , 3. If the Obfervations are. at a greater Di- 
ftance than twelve Hours, but in the lame Day ; - 
Make ule of the. Complement to twenty-four Hours . 
of the Diftance in Time, and take the Declination on . 
the contrary, or lower fide of the Equator ; and in- 
ftead of the Zenith Diftances, take the Nadir Di- - 
fiances or Altitudes increafed by ninety Degrees. 
Thus ; 
