THE surya' siddha'nta, 5:c. 571 



By De la Lande's tables, Hindu 



sphere, (§ 12) - - 3^- l" 50' 13,5" 



Difference, the former more advanced 



by 7 39 46,5 



which is contrary to what it ought to be, had the 

 observation been correct. 



62. The mean motions of Venus for a ceiitury 

 of Hindu years : — 



By the Surya Siddlianta = ' i^^qooo 



= 162revol. - - - 6^' 19° 48' 0" 



By De la Lande's tables, Hindu 



sphere, - - - - 6 18 59 23,5 



Difference, the former quicker by 48 36,5 



Mean heliocentrick longitude at the end of the year 

 4900 of the Caliyug : 



By the Smya Siddhanta = ^'^pgoow'"" 



= 7965 revol. - - . 2«- 10° i2' O" 

 By De la Lande*s tables, Hindu 



sphere, (§ 12j - - - 2 3 13 45,5 

 Difference, the former more advanced by 6 58 14,5 



Hence, '° ''^3'g,^ ^'^" = 860 years, for the age of the 



Sujya Siddhanta from this operation. 



63. The mean motions of Mars for a century of 

 Hindu years: — 



By the Surya Siddhanta = ^'1X0^0^"" 



= 53 revol. - - 2*- 0* 16' O" 



By De la Lande's tables, Hindu 



sphere, - - - i2 31 55 



Difference, the former slow by 15 55 



Mean longitude at the end of the year 49OO of the 



Call yug : 

 By the Surya Siddhanta =^l^^^Ai£22 



= 2 60 J revol. - 2^' iS" 4' 0" 



2 o 2 By 



