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178 Siddhanta-tattva-viveka. A summary of the different Siddhantas, or original texts on astronomy. By Kamalakara, son of Nrisimha, of Devagiri on the banks of the Godavari river. Contents: Time defined, cycles of Brahma, Devas &c., measure of time of day and night, effect of longitude on the duration of day, durations of the Yugas, of various eras, current down to the time of the Saka era, refutation of the opinion of the author of the Siddhanta-siromani, science of astronomy, excellence of the Surya-siddhanta, motion of the stars in space, creation, destruction, refutation of the opinion of Bhaskara Acharya on the subject, the poles, mythical character of the signs of the Zodiac, the positions of the Nakshatras, refutation of the opinion of Arya Bhatta regarding the motion of the earth, the blueness of the sky accounted for, (due to the quality of darkness Tamah), the shape of the earth (like a Kuthbela fruit,) supported in space by divine power, the opinions of the Yavanas on the subject, equatorial regions, position of the terrestrial sphere, longitudes of different places, eternity of the Meru mountain, diameter and circumference of the earth, calculation of the motions &c., of the earth, solstitial movements, drikkanas, coldness of the air in high p conversion of vapours into clouds, causes of rainbows, meteorite cause of earthquakes, (action of subterranean vapours on stones), of plagues (foul vapours), orbits of planets, calculation of the 43 of heavenly spheres, zenith and nadir, instruments for ascertaining sankrantis, centripetal force, cause of circular motion, of spheres, apparent motion of the celestial spheres, chords of arcs, diagrams, &c., &c. Beginning. brahmakhadaramadhyagavanija lonardendupurvvagraha- caurdasthapravahantagolaracana srstiryathavasthita | kale'smin gahane'vyaye'sti satatam yasmadiyam +++ yattannirgunamisamavyayaparam brahmakatattvam subham || yadutpattilaya sanya srstiryasmacca dehinam | brahmadinam vibhuh so'yam vyaktibhutah sanatanah || brahmandantasta mohanta bhagavamstejasam nidhih | namna'niruddhah kalatma svayyo'yam saviteti ca || mandalantarago'jakham bhavanani paribhraman | jalagolagrahaksinam bhaskarah sarvvago'vyayah || sastrapravarttako dhyeyah tattvajnaih kalabodhakrt || use