ब्राह्मस्फुटसिद्धान्त (ब्रह्मगुप्त - शून्य, कुट्टक, बीजगणित एवं सम्पूर्ण २१ अध्याय सान्वय सटीक)

342 BRAHMAGUPTA AND ASTRONOMICAL INSTRUMENTS respective diurnal circles, in proportion to the equino- ctial : the three circles should be placed for the Ram (Meṣa) and following signs, respectively, at the proper declination in degrees N. or S. ; the same answer contrariwise for the Crab (Karkaṭa) and other signs. In like manner three circles are placed in the southern hemisphere, for the Balance (Tulā) and the rest, and contrariwise for Capricorn (Mṛga) and remaining signs. Circles are similarly placed on both hoops for the asterisms in both hemispheres, as also for Abhijit and for the Seven Ṛṣis, Agastya, Brahmahṛdaya and other stars. In the middle of all these circles is placed the equinoctial. At the intersection of that and supporting hoops, the distant from each other half the signs, the two equino- xes should be determined; and the two solstices, at the degrees of obliquity from the equinoctial; and the the places of the Ram (Meṣa) and the rest, in the order of the signs, should be adjusted by the strings of the curve. Another circle thus passing from equinox to equinox, is named the ecliptic; and by this path, the Sun illuminating worlds, for ever travels. The Moon and other planets are seen deviating from their nodes in the ecliptic to the extent of their respective greatest latitudes (within the zodiac).¹

1. भूलोकस्य रचनां कुर्यादाश्चर्यकारिणीम् । अभीष्टं पृथिवीगोलं कारयित्वा तु दारवम् ॥ दण्डं तन्मध्यगं मेरोरुभयत्र विनिर्गतम् । आधारकक्षाद्वितयं कक्ष्यां वैषुवतीं तथा ॥ भगणांगुलैः कार्या दलितास्तिस्र एव ताः । स्वाहोरात्रार्धकर्णैश्च तत्प्रमाणानुपातः ॥ क्रान्तिविक्षेपभागैश्च दलिता दक्षिणोत्तरा । स्वैस्स्वैरपक्रमैः कार्या मेषाद् नामपक्रमात् । कक्षाः प्रकल्पयेत्ताश्च कर्क्यादीनां विपर्ययात् । तद्वत्तिस्रस्तुलादीनां मृगादीनां विलोमतः ॥ याम्यगोलाश्रिताः कुर्यात् कक्ष्यावारद्वयोपरि । याम्योद्ग्भाग संस्थानां भानामभिजितस्तथा ॥ सप्तर्षीणामगस्त्यस्य ब्रह्महृदीनां प्रकल्पयेत् । मध्ये वैषुवती कक्ष्या सर्वासामेव संस्थिता । [Cont. on page 341]