1A Sझीrgya-Siddata ( fror ; exi
{ of the hour-angle, ZPM or MPA, although with a cortin modification which bha commenbery prescribe, ud which makes of it something very near the ungle 'TPN. The text $nys simply attrity, blue * {e of the tour-right (for Mat, Bee notes to ii, 84.86, and 14-), but the continentary specified that, to find the desiredl angle in degrees, we Inust multiply the louy-ongle {i(3 rnd dividlk y t| half-way of the planet. 'This is equivalent to making a gundant of that rt of the cirele of dirnal revolution which ix between the horizon Hi the reqidia. |e measuring distances upon DR as if #1ey Wor pro ortional parts of J\. 'I'o make {the IGill procex« प्रदt, t] TO is notification *hould be the angle ]'NAV, wh 'fielh, ho'Y', it {y incitlex the horizon, whe both T५N and NP ००nne right. {{ ]le} ।n, whe both 2 reasket to nullity to that involved in he former pross, nnd Is of slight . account who alitutle is small, ax is lk the 9]Or in substituting for ( vr 'M wh: 1; ither the latitudenor' +}1£ declimation is great. The direction of the tle ife t११ (!t¢ is th seine. evidentl with the ot fln = aint quad: txtar f। poin६ in extion; thus, }h! cax illustrated by the figure, it j« ¥outhThe direction of the equari | cffcr•tion (ik$load xa } •j°nts p©I sition of itexideal with ternet e the nteridianbein -b n॥ artitles ne }। |intl $s 'R1 enterplans -north when float point IS €:५१४ of } ifiab, and youth It 'est of it, as 1p:cified it ver: 24 r? 1x 1', { el point } १.1c hri»7, 1.in 'lator y ninte between a h ) p nts, nstayedtead oln' north of the prime vertical In { k: for which he igure is d१nihnthe dife of the two would be the final res sulting tence: Since , N th। ]e lize of t« = xtraightf line(see tBlee 1xtnation given connction with chapter i}, it must be १educed in its value ३g a giu: | rar००ve" sitle it i lk = in a ircle ,f hikh th 4 digits ( relow 1 i। h which Cme digit equals 0 ty 343 + 40= 0, nearly--that sine is reduced to its ४१]1 wity by liviling it, lb The general subject of this the determination of directions 1 c$/ or the urpo«y of establishing the sitions, pon the list of the ea se५ rly \f the joints # «ontact YAD18b enerence, nal vepAuration, als) •d! the attention of ld (GreekH; Ptolemy devot«4A •ng! to it . levent Ind twelft hnters of the xixth book of his Syntaxis is representation of directions, however , and consequently Jib method of !tlculatiD १० {ified nil from these hrexpeAgd 26. 'o the altitude in time 17ata) add a tay na a half, and (livite by a half-day; by the quotient livide the latitudes and the afsks ; the results are the measue of those quantitics in digits (ignly) । ]; s p (1 dir (}