Mea Motions of the Poets 39 The positions are given as deduced both from the numbers of sevolu tions stated in the text, and from the 3ame as corrected by the Aja prefixed Aze the numbers of complete evolutions accomplished since the epoch, in the cases of the moon's apsis and nodehowever, it was necessary to employ the numbers of revolutions given for the whole Age. these not being divisible by four, and also to add to bheir ascertained amount of movement their longitude at the epoch (see below, under 57, 68) 54, Thus also are ascertained the places of the conjunction right) and apsis (mandocra) of each planet, which have been mentioned as Moving eastward; and in like manner of the nodes, which have a retrograde motion. Subtracting the result frorm a १hole circle. The page of the apsidea and nodes ave already been given above (under P. 41.44), both for the commencement of the Iron Age, and for A.D. 1850. The place of the conjunctions of the three superior planetb is, of course, the mean longitude of Ahe sun. In the case of the inferior planets, bhe placa of bbe conjunction is , in fact, the mean place of the planet itself in its proper orbit, and it is this which we have given for Mexcury and Venus in tha preceding table: while to the Hindu apprehen . sion, the mean place of bhose planets is the same with that of the sun. 55. Meltiply by twelve the paBa revolution of Jupiter, add the signs of the current revolution , ana divide by tb remainder marks the year of Jupiter's cycle, counting from Vijaya. 'e] This is the rule for inding the current year of bahe eycle of si: which is in uss throughout all India am which is eld the cycle of Jupiter, because thhe length of its years is measured by the passage of that planet, by its nean motion, through one sign of the zodia. According to the data given in the text of this Siddhanta, bhe length of Jupiter's year is Rafa 0h Bam ; the correction of the bia makes about 72m longer. Tt was doubtless on account of the near coincident of thi period with the true Bofar year that it was adopted as a measure of time; but it has not been isfactorily ascertained, so far as we are aware, where the cycle originnked of what is its Rge, or why it was made to consist of sixty years, including five whole evolutions of thbe planet. There was, indeed, also in use a cycle ot awelve of Jupiter's years, or the time of one sidereal revolution sae belowiy, 17. Davis (A5ReE. ti. 208, etc.) and WayTen (Kala Sankalita p. 197, etc.) have treated at some length of the greater cycle, end of bhe
