SIMPLIFIED RULES The mean motion of the sighrocca of Mercury per solar day – 17937020 degrees 4320000 1/200 of a sign+4 degrees+1/8 of a minute +1/60 of a second. Hence the rule. A rule for finding the mean longitude of Saturn: 37. Multiplying the grahatanu by 8 and dividing by 225 are obtained minutes; and dividing (the grahatanu) by 300 are obtained seconds. Adding these two together and increasing that (sum) by one-thirtieth of the Sun's (mean) longitude is obtained the (mean) longitude of Saturn.¹ The mean motion of Saturn per solar day = 27 Hence the rule. 146564 of a degree 4320000 1/30 of a degree +8/225 of a minute+1/300 of a second. Hence the rule. A rule for finding the mean longitude of Mars: 38. Multiply the grahatanu by two and subtract one- twentieth of itself from that these are minutes, etc. Then divide the grahatanu by 50: these are seconds. Add these (minutes and seconds) to half the Sun's (mean) longitude (in revolutions, etc.).: the sum is the (mean) longitude of Mars.³ The mean motion of Mars per solar day 2296824 4320000 of a degree 1/2 of a degree + (22/20) minutes + 1/50 of a second. ¹ Similar rules occur in Br.Sp.Si, xxv. 35 and Ś¡DVṛ, I, i. 52 (i ). ⠀
- Similar rules occur in BrSpSi, xxv. 33 and Ś¡DVṛ, I, i. 50 (i ).
