68 Description and Use of the

the sun and stars, &c. in the heavens, havebut one idea, the meaning of which is nomore than their distance (either of places onthe terrestrial, or of the luminaries in thecelestial spheres) from the equator.

The declination of a fixed star alwayscontinues the fame, but that of the fun,moon, and planets, varies.

136. Those stars, whose declinations areequal to the latitude of any place upon theearth, are called correspondents to that place;and pass once in every 24 hours vertically tothe inhabitants of such latitude : that is, thosestars appear in their zenith, or are directlyover their heads. Hence the following

PROBLEM VI.

To find what stars pass over or nearlyover the zenith of any place.

1 37. Find the latitude of the place byprob. ii. art. 98. upon the terrestrial globe,which is the distance of that place from theequator; then turning the celestial globe,all those stars which pass under the strongbrass meridian at the fame distance from theequator, will pass directly over the heads

of