330 Description and Use of the

353. Note, Every star which rises withany point of the ecliptic has the fame ob-lique ascension with that point.

The star marked v, in the leg of the con-stellation Bootes, of the fourth magnitude,which is represented in fig. 36. at the point*, having its north declination f * 17“ 21',its ascensional difference a f, rises abovethe horizon with the fame point of the equa-tor with which e, in the diurnal parallel ofthe first point of Cancer, rises. So that ha-ving its right ascension 204°, and declina-tion 17 0 21 its ascensional difference andoblique ascension may be found in the tri-angle a f%, in the same manner in whichthe former were found in the triangleage.

As the ascensional difference is subtractedfrom the right ascension to find the obliqueascension, if it be added to the right ascen-sion it will give the oblique defcension. Forthat point of the equator which sets withthe diurnal parallel of the first point ofCancer, comes to the horizon before thepoint of its right ascension, or that withwhich it culminates upon the meridian.Hence we have another method of finding

the