Page:English translation of the Surya Siddhanta and the Siddhanta Siromani by Sastri, 1861.djvu/18

. To 1,963,720,000 the number of elapsed years, add the number of years elapsed (from the end of the last to the present year;) reduce the sum to months (by multiplying it by 12;) to the result add the number of lunar months from the beginning of the light half of the  (of the current year to the present lunar month.)

. Write down the result separately; multiply it by the number of additive months (in a ) and divide the product by the number of solar months (in a ); the quotient, (without the remainder,) will be the elapsed additive months. Add the quotient (without the remainder) to the said result, reduce the sum to days (by multiplying it by thirty) and increase it by the number of (lunar) days (passed of the present lunar month).

and. Write down the amount in two places; (in one place,) multiply it by the number of subtractive days (in a ); divide the product by the number of lunar days (in a ) and the quotient (without the remainder) will be the number of elapsed subtractive days. Take the number of these days from the amount (which is written in the other place) and the remainder will be the number of elapsed terrestrial days (from the time, when the planetary motions commenced) to the present midnight at.