﻿234 ON THE ASTRONOMICAL COMPUTATIONS 



the number of its revolutions, the remainder will 

 be the number of its Savan days contained in a Yug. 

 The difference between the number of the revolu- 

 tions of Surya and Chandra gives the number of 

 Chandra months ; and the difference between the 

 Saura months and Chandra months gives their num- 

 ber of Adlii months. Deduct the Savan days from 

 the Chandra days, the remainder will be the num- 

 ber of Tifhi Cshayas. The number of Adhi months, 

 Tit* hi Cshayas, JSacshatra, Chandra, and Savan 

 days, multiplied severally by iooo, gives the num- 

 ber of each contained in a Culpa. 



" The number of Mandochcha revolutions, which 

 " revolutions are direct, or according to the order of 

 *' the signs contained in a Calpa, is of Surya 387 ; 

 ts of Mangala 204; of Buddha 368 j of Vrihaspat'i 

 " 900 ; of Sucra 535 ; of Sani 39. 



" The number of revolutions of the Patas, which 

 <c revolutions are retrograde, or contrary to the order 

 " of the signs contained in a Calpa, is of Mangala 

 " 214; of Buddha 488 ; of Vrihaspati 174; of Su- 

 Ci era 903 ; of Sani 662. The Pal a and Uchcha of 

 " Chandra are already mentioned." 



It must be observed, that, although the planetary 

 motions as above determined might have served for 

 computations in the time of Meya, the author of the 

 Surya Siddhanla, yet for many years past they have not 

 been found to agree with the observed places in the 

 heavens in every instance ; and that corrections have 

 accordingly been introduced, by increasing or reducing 

 those numbers. Thus the motions of the moon's apo- 

 gee and node are now increased in computations of 

 their places by the addition of four revolutions each in 

 a Yug to their respective numbers above given. The 

 nature of these corrections, denominated in Sanscrit 

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