________________
JUXE, 1888.]
JACOBI'S TABLES FOR HINDU DATES.
155
The occurrence of an eclipse is ascertained by the following rules :At new-moon certain if d. is between 924 and 1000, or 0 and 76. . solar 3 doubtful
894 924, or 76 → 106. eclipse is (impossible » »
, 106 » 894. At full-moon certain if d
950 and 1000, or 0 and 50. & lunar doubtful
930 950, or 50
70. eclipse is impossible , ,
70
930. Example.-Was there a lunar eclipse in Śråvaņa, A.D. 1144 ?
a. 6. C. d. A.D. 1844 3352 526 3 97 a= 10000 - 7698=2302. 2nd July (554) new moon Srávaņa 7 cent...... 4345 585 50 822 md=2302 + 5000 = 7302.
A.D. 1144 7697 111 53 919 17 July, l.y. 7049 186 542 142
-- - -- 4746 297 595 61
eq. b. eq. c.
274 95
4. = 5115
Full-moon occurred about 8h.13 m. before the , new-moon or fall-moon, and whether at that beginning of the 17th July; or on the 16th July, time a solar or lunar eclipse has happened or not. about 15 h. 47 m. The increase of d. in eight The disadvantage consists in leaving some cases hours being 2,2 must be retrenched from 61. | doubtful. The latter is especially the case with The remainder is 59. Therefore, as 59 falls solar eclipses. For, oar calculation does not within the limits of a doubtful lunar eclipse, show whether an eclipse of the sun was visible it is likely that there was a small lunar in India, even if the sun was, at the time of eclipse; as will be found to be the fact by 1 the eolipae, above the horison." But an eclipse referring to the "Canon of Eclipses," the great of the moon is visible wherever the moon work of Oppolzer (Denkschriften der Kaiserl. is above the horison of the observer ; i.e. Akademie der Wissenschaften in Wien 1887, wherever the eclipse of the moon oooors at which has superseded the “L'art de vérifier les night. To conclude,- if one of the abovedates, from which is extracted Canningham's named works on eclipses is available, they List of Eclipses in his Indian Bras.) The should be used in preference to the approxiexample just given shows at once the advantage mate calculation. But, if no other means are and the disadvantage of my method. The at band, this calonlation, which is an ingenious advantage consists in this, -that by the same device of M. Largetean, will be found calculation we come to know the moment of
useful."
" Por caloulating such or any other particulars gonnected with solar soli paes, the reader is referred to Sahram's Tables (Denkschriften d. K. A. d. W. Wien 1890) which are supplementary to the Canon of Eclipses." With the help of these two works all problems referring to eclipses can now be solved by an easy calculation.
13 It must be remarked, that colipa, especially solar ones, instanced in historical documente, were, in many
ANG, not notually, observed walipoon, but onlonlated onge. Yor the smaller solar colipsed, not onlonlated beforehand, would pass unobeervedsino. even the larger ones (y up to 7 degrees) are noen only under
favorable ciroumatanoen, as when the sun is setting or rising, or is seen through tog or thin cloud. Therefore eclipses mentioned in insoriptions are generally to be interpreted as walonlated, not as actually observed. As the resulty of a oslaulation of an eclipse varies with the different siddhantas, and as it is correct only for a period within a few centuries of the composition of the Siddhants wed, it will be safest to identify the coll peet mentioned in incorptions with ruch notarily oocurred, bat keeping in mind the eventuality that within and near tho limits of powible walipua, the Hindu may have predicted no wollpe won Dome did ooour, or vice vered
