A History of the Kerala School of Hindu Astronomy (in Perspective) c10.s8.75

c10.s8.75

The Nyāyaratna occurs in two versions, which differ slightly by the presence or absence of certain verses and in the arrangement thereof. The Veṇvārohāṣṭaka of Putumana Somayāji is a manual for the accurate determination of the moon at short intervals. His Pañcabodha III¹ is a practical manual for the computation of Vyatīpāta, Grahaṇa, Chayā, Śṛṅgonnati and Mauḍhya. Grahaṇagaṇita IV commences with the characteristic introductory verse of Putumana Somayāji, viz., madīya-hṛdayākāśe etc. and so is likely to be his work. So also Grahaṇāṣṭaka II, which, though a self-contained work, forms a part of the said Grahaṇagaṇita. K. Rama Varma Raja makes mention of a tradition which attributes to our author a work called Mānasagaṇitam.² This is likely to be the Malayalam commentary on (Laghu)mānasa which has now been identified and whose introductory verse contains words reminiscent of Putumana Somayāji's expressions. In horoscopy, he wrote the highly popular Jātakādeśa(marga)³ which is known in two recensions, both of which might have been written by him.⁴