In the remaining divisions original: "shesha vihorah", the lords of the first, fifth, and ninth houses are considered. The divisions do not always result in equal portions of the gems referring to planetary degrees or qualities. From one's own zodiac sign, the seventh house and its lord are analyzed. In even signs, the calculation follows a specific sequence, while in odd signs, the lords of the seventh are determined differently. The sages have declared that the lords of the portions follow the sequence of the planets starting from the Sun. 8. In the odd signs, the values are assigned to the five elements—earth, water, fire, air, and ether—while in even signs, the order is reversed. 9.

Thus ends the Chapter on the Seven-fold Divisions Saptakavarga: a system of calculating planetary strength based on seven harmonic charts

Now, the Calculation of the Rays Rashmi-sadhanam: a method to determine the "radiance" or power of a planet based on its position

The Sun and other planets are considered in their signs of exaltation and debilitation. The Sun is exalted in Aries at ten degrees. The values for the planets are calculated by subtracting their current position from their exaltation point. When a planet is in its sign of debilitation, its rays are considered diminished. 10. One should place the values for the friendly, neutral, and inimical signs separately. The wise say that the rays are multiplied or divided based on the planet's specific state such as being retrograde or combust. 11. The longevity Ayurdaya is then calculated by multiplying these factors. The results are converted into years, months, and days. 12. In the division of the ninth parts Navamsha, the calculation is refined further. 13. This method should be applied to the face and other parts of the planetary body to determine the full span of life.

Among the planets, if a planet is in its sign of debilitation, it gives only half of its assigned longevity. The Sun and Mercury have specific divisors for their rays as ordained by the ancient teachers. 14. The multipliers for the planets range from three and a half to eight. Benefic planets contribute their full term, while malefic planets may reduce the total unless they are in specific favorable positions. 15. The longevity of the physical body Tanur-ayu is known through the inverse calculation of the years. Therefore, by this proportion, the results in months and days are derived as previously explained. 16. The longevity contributed by the Ascendant Lagna is equal to the number of degrees the Ascendant has traversed in its sign. This is converted into years and added to the total. 17. If the Ascendant is strong and occupied by the Moon at night, or the Sun during the day, the calculation is adjusted by the wise. 18. One must analyze the strength of the constellations and the actions of the planets in their respective divisions to determine the final outcome of the lifespan. 19.

Thus ends the Chapter on the Determination of Longevity

Now, the Calculation of the Periods Dasha-sadhanam: the system of planetary periods that rule different stages of a person's life

The periods are calculated starting from the constellation of Ketu. Six years are assigned to the Sun, and fifteen to the Moon in the cycle starting from the constellation of Magha...