Shodasa vargas and Shadvargas

Sloka. 30. Lagna or the whote, Hora orhalf, Drekkana or 1/3, Swaramsag 1/7th, Navamsa or 1/9th, Dasamamsa or 1/10th, Dwadasamsa or 1/l2th, Kalamsa or l/l6th, Thrimsamsa or l/30th, and Sashtyamsaor 1/60th of a sign usually called Dasavarga produce loss, danger, long life and prosperity to men. Hora means the half of a Rasi; in an odd signs the halves belong respectively to the Sun and the Moon, and in even sign one to the Moon and the Sun. The Drekkana or the third portions of a sign are owned by the iords of the sign itself, of the son’s or 5th house, and of the 9th house of Dharma.
There are sixteen Vargas, but only ten are given herd. Even these ten Vargas are but seldom consulted. Six and sometimes seven are usually resorted to and are known as Shadvarga and Sapthavarga respectively.
That is; (l) Rasi, (2) Hora, (3) Drekkana, (4) Chathurthamsa or 4th (5) Sapthamsa, (6) Navamsa, (7) Dasamamsa (8) Dwadasamsa (9) Shodasamsa (10) Vimsamsa (11) Siddhamsa or one twenty-fourth, (12) Bhamsa or one twentyseventh, (13) Trimsamsa, (14) Khavedamsa or one fortieth (15) Akshavedamsa or one forty-fifth and (16) Shashtyamsa or one sixtieth.
According to the Yavanas, the lords of the Horas and Drekkanas are as described in the following sloka :
According to this view, the ownership of the Horas is not restricted to the Sun and the Moon, but is shared by all the planets. But this view of the Yavanas is not recognised by Varahamihira, nor even by authorities like Satya, who has thus stated.
But it may be mentioned here that this convention of the Yavanas has been, accepted for Prasna purposes (Horary astrology) while the other is recognised for purposes of horosccpy.
SIoka 31. The owners of the Sapthamamsa, or the 7th portions of Lagna and other hougas are in the case of an odd sign to be counted regularly from the lord thereof, while in the case of an even sign, they’are to be reckoned from the lord of the 7th house onwards.
This sloka gives the rule for finding out the lord of the Saptamamsa in the cases of odd and even signs. Thus, for example, the Sapthamamsas of Thula an odd sign will begin with Thula and end with Mesha while those of Vrischika, an even sign, will count from Vrishabha the 7th sign reckoned from Vrischika and close with Vrischika. The magnitude of each segment is 4 2/7.
Saptharnamsas are useful to ascertain the character or temperament of the native, he being cruelly disposed if born in a Krura Sapthamsa, or peaceful in nature if his birth happens in a Saumya Saptamamsa. This division is also utilised for seeking information about one’s brothers, etc.