पञ्चसिद्धान्तिका (आचार्य वराहमिहिर - सूर्य, रोमक, पौलिश, वासिष्ठ एवं पितामह सिद्धान्त)

262 PAÑCASIDDHĀNTIKĀ XIV.4 ised to give a method for other places in a subsequent chapter devoted to chedyaka. The following rule is in fulfilment of that promise.

1. Construct on the ground a level circle with diameter equal to 180 digits. On its circumference put down, at equal distances, marks showing signs and degrees (etc.). Also put down marks showing the declinations (of the end- points of the signs Aries, Taurus and Gemini). (Through the centre of the circle draw the north-south line and at right angles to it draw three chords through the marks showing the declinations for the ends-points of the signs Aries, Taurus and Gemini).
2. From the centre, draw three circles with diameters equal to the three chords which have been drawn through the declination marks at right angles to the north-south line, and graduate them with marks (of signs and degrees) like the first circle.
3. Then (from the same centre) draw a line towards the latitude (i.e. towards that point of the first circle which marks the latitude of the place) and extend it upto the mark (indicating the latitude of the place) on the circumference of the first circle. (This is the latitude-line). On the chord corresponding to the desired declination (i.e. declination of the end-point of the desired sign), mea- sure the portion lying between the latitude-line and the north line (i.e. the line drawn from the centre to the north point).
4. Lay off the double of that (like a chord) on the corresponding circle. Ten multiplied by one-half of the degrees in the arc subtended by that chord are to be known as the vināḍīs of ascensional difference in the case of the first sign. In the case of the other two signs, they are the vināḍīs of the mixed ascen- sional difference (i.e., the mixed ascensional difference of Aries and Taurus and the mixed ascensional difference of Aries, Taurus and Gemini). Consider Fig. 1. ENWS is the level circle of diameter 180 digits drawn on the ground, E, W, N and S being the east, west, north and south cardinal points, respectively. EW is the east-west line and NS the north-south line. The arcs Ed₁, Ed₂ and Ed₃ are equal to the declinations δ₁, δ₂ and δ₃ of the end-points, of the signs Aries, Taurus and Gemini respectively. Wd' = Ed₁. Wd" = Ed² and Wd"' = Ed₃. d₁d', d₂d" and d₃d"' are the three chords corresponding to the declinations δ₁, δ₂ and δ₃, respectively. These are at right angles to the north-south line. 1c. A. राश्यंकचिह्नं C. राश्यंकू चिह्नं c. B. अक्शेतरे d. A. मापक्रमं; B. मायक्रमः d. A.B. ॰शोच्छमादाय (B2. शोछ) 2b. B. पद for दप B2.3. क्रमाशा c. AB. ॰वदंकाक्षिप्रं; (B. gap for वं) 4a. B. द्विगुण B1.3. प्रसार्य; B2. प्रस्तार्य B. वृशौ d. A2. वृत्तं; B. वृत्तनुत्रय b. A.B. om दिक् B. नवापांशकादलाभ्य (B1. भ) स्ताः 3b. A. om प्र A. कुर्याक्व भगणपर्यन्तां; c. A. विनाड्ये; B. विनाप्रे B. कुर्यार्कलंगणपर्यन्तात् (B1.2. ॰कर्यार्क॰) d. B2. त्तेथाः B3. मिश्रा