5/0 ON THE ANTIQUITY OF 



GO. The motion of the Sun's apogee in a century 

 of Hindu years : 



By the Surya Siddhanta =,-3^^= O'OOQ' 11",6 



By De la Lande's tables, Hindu 



sphere, = 5 47 ,6 



Difference, the former too slow by 5 36 ,0 



Longitude of the Sun's apogee at the end of the year 



4900 of the Cali yug : — 



T, ^v o C'-;j/ 4 1955881000X387 



By the ^urya ^iddhanta = 4520000000 



= 175 rev. 2' 17° 17' 16'',4 

 By De la Lande's tables, Hindu 



sphere (§ 30) =2 18 35 49,8 



Difference, the former less by 1 18 33,4 



TT 1° 18' 35 ',4X100 ,,^p r x-L r 



Hence, r-~ = 1105 years, rorthe age or 



the Surya Siddhanta from this operation. 



61. The position of Mercury has been ill deter- 

 mined by the author of the Surya Siddhanta, proh^hly 

 from that planet being too near the Sun ; for it will 

 require about 1454 years yet to come, before the Eu- 

 7'opean tables and the Surya Siddhanta agree in giving 

 it the same position j unless there are some inequali- 

 ties in its motion not yet observed by European as- 

 tronomers. 



The motion of this planet for a century: — 



By the Sury^ Siddhanta^ _ 4 434265x100 



— IU800U0 



= 415 revolutions 2' 15° 30' O"* 

 By De la Lande's tables, Hindu 



sphere 2 16 1 34,3 



Difference, the former too slow by 31 34,3 



Mercury's mean longitude at the end of the year 

 4900 Cali yug: — 



» 4.U C c- IJI , -lis t2fi5X4900 



By the Surya Siddhanta = ^osuooo 



= 20345 revel. 3' 9° 30' 0" 



By 



