[Selection of system for longevity, Amsayurdaya calculations, additions for Ascendant's contribution, rectification for planetary contributions, reductions for Amsayurdaya calculations, Vyayadi Harana, Pindayu, Ascendant's contribution in Pindayu, reduction for rising planets, Naisargikayurdaya, full span of life, unlimited longevity, span of full life for various animals]

1. The people all over remain perplexed over the question of longevity. So I narrate the relative principles based on the Shastras here under.

2-3. SELECTION OF SYSTEM FOR LONGEVITY COMPUTATION. Out of the triothe Sun, the Moon and the Ascendant, if the Ascendant is the strongest, Amsayurdaya should be resorted to. Pindayu is the best, if the Sun is predominant, while Nisargayu is the apt choice with Moon prevailing. If the three in question are bereft of strength, then Jeevasarma's system can be used.

4. AMSAYURDAYA CALCULATIONS. The longitudes (counted from Aries first point) of the (seven) planets and the Ascendant should be divided by 200 to get the number of years. The quotients in later processes should be multiplied by the respective multipliers to get months, days and Ghatis.

5. ADDITIONS FOR ASCENDANT'S CONTRIBUTION. If the Ascendant is strong the number of years equal to the Rasis it has traversed should be added. Months etc. thereof should be guessed by rule of three method.