THE SURYA'SIDDHA'NTA, 8cc. S'tg 



U'liich are precisely the same as those computed from 

 De LA Lande's tables for the same instant (§ i2). 



19. However, though the motions above assign- 

 ed, give the mean Heliocentric longitudes of the 

 planets perfectly correct at the end of the year 4900 

 of the Calit/ug; yet, on account of the small diffe- 

 rences between them, and the real mean annual 

 motions, as well as on account of the inequalities 

 observed by modern astronomers in the motions of 

 some of the planets, they would every year after vary 

 more and more from the truth, in proportion to the 

 differences. This, in fact, is the case with all the 

 Hindu systems of astronomy : and when the error 

 becomes sensible, they either form a new system, or 

 else introduce a correction to the old, which they 

 term beej. 



20. The Hindu systems of astronomy now in use, 

 maybe divided into three distinct classes. First, such 

 as assume a conjunction of the sun, moon, and pla- 

 nets, with the nodes and apsides of their orbits, in the 

 first point of Aries at beginning and end of the Calpa 

 of Brohma *. Secondly, such as assume a conjunc- 

 tion at the beginning and end of the Calpa of Va- 

 RAHA, with a mean conjunction at the end of certain 

 cycles or periods of years. Thirdly, such as assume 



* TvLZ Cal/ia ofB.vOHMA contains 4320000000 Hhidu years, 

 and commenced 197294 WOO years before the beginning; of the 

 present Cali Yug : it may have derived its name from Brohma 

 Gupta, who may probably have been the author of it. The 

 Cal/ia of Varaha consists of the same number of years, but com- 

 menced 17064000 years later, and derives its name from Varaha 

 MiHiR, author of the Swya SidMianta,Jat Karmb, 8cC. The Caljia 

 is divided into leaser periods of years, called Man-xantaras 2X\A Yugsi 

 the intention of which seems to be, to assist the memory in calcu- 

 lating the \cars expired of the system: at least they answer no 

 other purpose at present. In a valuable fragment In ray possession,- 

 the durations of the CaJ/ias, Manwantaras, and Ytigs, of the ancient 

 Hindus^ are stated totally different from those now in u^e. 



no* 



