216 ON THE HINDU 



ready shewn, that the Surya Siddhdnta must have 

 been written between seven and eight hundred 

 years ago ; we shall therefore call it the end of the 

 year 4100 of the CaliYug, or A. D. 999, which 

 will be near enough for our purpose; then w, in 

 the above formulae, becomes 4100. 



In the year A, D. QQ^, the corrections requisite 

 to be applied to the Moon, Jupiter, and Saturn's 

 mean places, on account of the inequalities in their 

 respective motions arising from mutual attraction*, 

 were 



For the Moon, — + 8' 50" = + 530';o 

 For Jupiter, ' — + 13 11,7 =+ 791,7 

 For Saturn, 31 48 r= - 1908,0 



These must be brought now into the formulas 

 as they could not, from being variable, be in- 

 cluded in the mean motions. Hence, the mean 

 motions requisite to give the mean places of the 

 planets in A. D. 999^ agreeing with European ta- 

 bles, are as follow : — 



Hindu sphere. 



r. 8. ° ' ' 



Sun, 1 00 00 00 



Moon, 13 4 12 46 40,613 + ^ ^ ^"+^ ^ ^ 



' ' 4 10 



Venus, 1 7 13 U 9,^3,6^5 + ''\'''/' 



Mars, 6 11 24 19,150 - -LI^-L"-" 



4 10 0. 



Jupiter, 1 00 20 50,483 + ^jl^J-^^-jujliI 

 Saturn, 12 13 09,343 - ' "' ''"+^ ""^ ■. 



which quantities being reduced, and compared 

 with the motions given in the Surya Siddhanta, we 

 shall have 



See Asiatic Researches, Vol. VI, p. 368, § 64. 



