236 Description, and 'Use of the

consequently, if the declination of any staris equal to the latitude of any place, thatstar, by a line conceived to be drawn fromit to the center of the earth, will describe theparallel of that place; whence it becomesa correspondent, not only to that particularplace, but also to all those places which liein the same parallel of latitude, by passingperpendicularly over them all once every 24hours. But as a preparation, we must firstshew, by the following problems, how tofind those places to which any star is a coivrespondent, and those stars which are cor-respondents to any place.

PROBLEM L.

To find all those places to which anyflar is a correspondent.

293. First find the declination of the sta ron the celestial globe by problem V. art. 55.and remember whether it be north or south ;count the same number of degrees upon thestrong brass meridian of the terrestrial globethe fame way from the equator, and notethe place by holding the edge of a cardthereto j turn the globe from east to west,

and