Celejlial and *serrejlrial Globes. 315

it must be at K, at six o’clock in the morn-ing ; at noon the vertex will be at O, uponO P, the sun’s proper meridian; and at sixin the evening it will be at A, upon the sixo’clock hour-circle again j and when thevertex arrives at G, upon the eastern edgeof the disc, the fun will be seen to set west-ward of the vertex.

The required side ©K, which is the fun'sdistance from the vertex, is found by count-ing the quantity 77 0 53' upon the quadrant,from 0 to K j and the angle §KP, 8o°ii'j the fun’s azimuth from the north maybe measured by producing the side K©, to90 degrees from K to m, (art. 327.) theside J£P being already produced on theother side of the strong brass meridian, K Pis known to be 38° 28'} therefore countits complement 51 0 32', from P to n, uponthat meridian which passes through -2, andthere make a mark; now remove the qua-drant of altitude to cut the opposite pointof the horizon to that at which it stood be-fore, and count thereon from 0 down-wards 12 0 07' to m, where make anothermark} then an arch of a great circle applied

to