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EPIGRAPHIA INDICA.
[VOL. XIV.
equation given in the new table), when it is plus (+), and add to 60 4 the amount of the equation, when it is minus (-); the signs are given in the heading of cols. 6, 7, Tables XLVIIIA and B.
The equation can also be obtained with quite suficient approximation by noting the difference between the equation of the day and the equation of the previous day cols. 6, 7), dividing this difference by 24, and applying to the equation of the day the amount proportionate to the hours intervening from mean sunrise (see example given below, $ 248, ü, B); or, perhaps easier, the true san's longitude at mean sunrise having already been found, by calculating the mean sun's longitude at mean sunrise, as shown in $ 245, and subtracting the one from the other.
(ii) The lagna.-To find the time of rising of the named sign on the day concerned, calculate thes for mean sunrise as above explained, but this time use degrees, minutes and seconds (col. 8 of either Tablo XLVIII A or B). Table XXII, Indian Ohronography, gives the beginning and ending points of the named sign. Adding to these 360°, if necessary, deduct from their value the value of s at mean sunrise. The result shews the distance from the sun at mean sunrise of the beginning and ending points of the sign. Multiply the degrees by 4 for minates, and the minntes by 4 for seconds of time. The result gives the times of rising of the beginning and ending points of the named sign.
Examples of Work 248. Given an inscription date to be examined, with the details Saka 1412, Friday, the day of Uttara Bhadrapadă, Chaitra krishna 12, Mithuna lagna.
The year is A.D. 1490-91 (Saka 1412 expired). Chaitra krishna 13 will be about 25 days later than the day of Chaitra sukla 1. Work first in the usual way by the Indian Calendar.
Day. Week-day. (Table I, cols. 19-25) . (Table IT for 25 day) . 25
4 8466 907 68
106 6 8541 337 332 (Table VI equation 6) .
260 (Tabla VII equation c) . . . . . 7
Tithi-index, t, = 8808 The day was 106, which (Table IX) = 16 April, A.D. 1490.
Week-day 6 = Friday. The index t shews (Table VIII) that the tithi current at moan Bunrise was Chaitra krishna 12. We then work for the nakshatra-index. ox 10 . . .
. 3320 Constant . . . .+ 7207
527 Legs for the sun's equation o . - San's true longitude, .. . 520 Add the tithi-index, & . . 8808
Nakshatra-index, . . 9328 This value of n shows (Tablo VIIT) that by the equal-space system the moon at mean sunrise of the given day was in the nakshatra Uttara Bhadrapada. So far so good. The date seems genuine ; but we want to be certain, and we refer to the present Tables.
0.
b.
81
264
