314, Description and Use os the

{051° 32', the latitude of the place, andturn the globe till the sixth hour upon theequator comes under the graduated side ofthe strong brass meridian; then the move-able meridian, together with that whichpasses thro’ will represent the six o’clockhour-circle F K P A g 3 six the quadrant ofaltitude to 15 0 33', at the point 0, countedfrom Æ the equator 3 turn the quadrant tothe point K, which represents the center ofthe artificial horizon, and the proper triangleswill be formed.

In the right angled spherical trianglesA Po, KPO, right angled at P, are givenPK, equal to PA, 38° 28', the distanceof the vertex from the pole, 0 P, the path’sdistance from the pole 74 0 zy'. To find§K, or ©A, the fun’s distance from thevertex at the hour of six, and either of theangles, G A P, or 0 K P, the fun’s azimuthfrom the north at the same time.

It is plain that P o, being the fun’s pro-per meridian, F P g at right angles to it,must be the hour-circle of six in the morn-ing and evening, and that the fun rises,when the vertex B comes in the westernedge of the fun’s enlightened disc. Therefore

it