. Glasgow mechanics' magazine; and annals of philosophy . Vol. IV. ^TCALCULATION OF THE LUNAR ECLIPSE TO ^A^E PLACE JS boBCr ii;// ON THE 23th November, lS25^,,:,^f^i[.)^ jgg [jj^, noooi By Mr. J. Kinnison, Schoolmaster of L€cropfi*,ifofrnT <?<?IHjT -jyTonjunction at 11 minutes 45 seconds past 4 oclock^ P^Ml^^^^^L ,pp Let P represent the suns hor. parallax, • i rH^^ p, the moons do .....^,._^y.^..^...,^^^^^^ D, the suns semi-diameter, ...^...^.r * 16 14 5 d, the moons do .^^^,^^^5^. 14 38 d (T^ d (~^ the relative motion in longitude,.... 28 0 4 dl, the true motion in latitude,,
. Glasgow mechanics' magazine; and annals of philosophy . Vol. IV. ^TCALCULATION OF THE LUNAR ECLIPSE TO ^A^E PLACE JS boBCr ii;// ON THE 23th November, lS25^,,:,^f^i[.)^ jgg [jj^, noooi By Mr. J. Kinnison, Schoolmaster of L€cropfi*,ifofrnT <?<?IHjT -jyTonjunction at 11 minutes 45 seconds past 4 oclock^ P^Ml^^^^^L ,pp Let P represent the suns hor. parallax, • i rH^^ p, the moons do .....^,._^y.^..^...,^^^^^^ D, the suns semi-diameter, ...^...^.r * 16 14 5 d, the moons do .^^^,^^^5^. 14 38 d (T^ d (~^ the relative motion in longitude,.... 28 0 4 dl, the true motion in latitude,,., ,,......._ 2 46 7 I, the inclination of relative orbit, h 39 38 L, the moons latitude in conjunction,N 47 41 6 Here 0 m = L co§. I = 47 27 6, the nearest distance of centres. To find T, the time of describing A m. 3600 L sine I cos. IT = — = 10 0 8 ^ d—^o To find the ^ U. Sine -<f^ U = 0-; ^^ . = 600 397 25 To find L W2, the semi-duration. (P » D tZ) 3600 cos. I COS. UL wi = ^-^ ? — -= 66 43 d ^.^<Q Hence the duration of the ecl
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