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112
EPIGRAPHIA INDICA.
[VOL. XVI.
Computation of a date. Example 3. We will now take a suppositious Record-date, and in the following examples explain the complete method of work for proving the accuracy of all its details; and for settling some other matters.
The date is "Saka 1148 expired, K.Y. 4327, Vyaya, Saturday, Bhādrapada sukla 5, Kanya 1, Bava karnna, nakshatra Visakha, yoga Vaidhfiti, Kanya lagna."
Table LXI shews that the year corresponded to A.C 1226-27; that in that year true Mésha-samkrānti took place 3 55after mean sunrise o Wed., 25 March (Day 84 from 1 Jan.); that the civil day Chaitra sukla 1 was Sunday, 1 March (Day 60 from 1 Jan.); and that (col. 8) the lunar month Ashādha was ntercalated in that year. The year was called "Vyaya" in South India, " Vikțita" in the North.
The interval of days between the initial days of the solar and luni-solar year was (84-60) 24.
In this example we work for the values of a, b, c and t at mean sunrise of the day Chaitra lukla 1, which is stated in Table LXI to have been col. 20) a Sunday. We work by the first process shewn above, and with full decimals. In using Table LXXIV for the interval of days24 as already stated-it is observed that the week-day number (col. 3) for that number of days' interval (col. 1) is 2, and that, since the week-days obtained for the year from Tables LXXII, LXXIII are respectively 6 and 6, total 12, the addition of 2 will make total 14, or 0, or a Saturday, whereas the day we are working for was Sunday. Hence we use the figures for 23 days' interval, week-day 3, which gives us the correct a, b, c for 1 Sunday. (Sue note to E.cample 1.)
w.-d. (Tablo LXXII) K.Y. Cent. 43 . (6) 8913-7771 214-1179 279.7019 (Table LXXII) Year 27. (6) 9587-5412 907.9933 0.0428 (Table LXXIV) 23 days' interval (3) 1534 2032 92 7094 9315554
At mean sunrise on (1) Sunday, 1
March, A.D. 1226, 1.e. the day
Chaitra sukla 1 . . . (1) 35.5215 214-8206 211-3001 The above work has been thus fully carried out in order to prove the correctness of the entries in Table LXI, cols. 23, 24, 25, which are the same. This work is not required to be done in practice as the Table provides the information.
Now knowing the Table entry to be accurate, we proceed.
The tithi. Ordinary work. Example 4. The true tithi. The given date is Bhadrapada sukla 5. Table LXIII A shews that, Ashadha having been intercalated in the year in question and Bhadrapada being therefore the seventh, and not the sixth, lunar month of the year, it began about 177 days after the day Chaitra sukla 1; consequently Bhädr. buk. 5 was about 181 days after. Having added
The mean tithi (and probably the mean nakshatra and yoga also) was bad in earlier years-to how lates date is not yet known. The moon tithi is the mean moon's distance from moanson, our a. To find it add to the Mcertained value of a (s in Example 8) for the day the sum of the greatest eqnations of moon and san, i.e. 199-1150. The total gives the a of the mean tithi (- t of the true tithi). Thus for the day in question the
oan tithi-index is (36 +199) 235, or (855215+199-1150) 234-6365. This was its valuo at moan sunrise of the given day.
