Celejlial and T 'errejlrial Globes:. 33 7

to the time os ancient authors, if their au-thority may be depended on.

PROBLEM LXXXVI. '

Given, the latitude and ancientlongitude of a fixed star :

To find its right a/cenfion and de-clination.

Elevate the celestial globe to 66 \ degrees,bring the pole of the ecliptic into the zenith,and there fix the quadrant of altitude japply its graduated edge to ■ the given star,and it will cut its present longitude, eitheron the ecliptic or broad paper circle, whichin this position of the globe coincide witheach other : make a mark on the quadrant,at the latitude of the given star, and removeit to its ancient longitude, as found above ;then bring the graduated edge of the move-able meridian to the mark just made uponthe quadrant of altitude, and set the centerof the artificial fun to that point which willthen represent the ancient place of the givenstar. That point of the moveable meridian,upon which the center of the artificial sunZ was