________________ INTRODUCTION xxvii (b) Apoha-prakaranal or Apobanama-prakarana.2_This treatise deals with apoha or vyavritti (exclusion or negation). It is not available in Sanskrit but its Tibetan translation is extant. It is by Pandita Bhavyaraja of Kashmir and Blo-etn-sesa-rab, a Tibetan Lama. (Stan-hgyur-mdo CXII. 14.). (c) Paraloka-siddhi--Dharmottara has proved the existence of next world in this work. It is not available in original Sanskrit but its Tibetan translation by Pandita Bhavyaraja and Lama Blo-etn-sesa-rab, mentioned above is available. (Stan-hgyur-mdo. CXII. 15.). (d) Kshana-bhanga-siddhi-It is a treatise on the theory of momentariness. It is also not available in Sanskrit but its translation in Tibetan by the two scholars mentioned above is available. (Stan-hgyur-mdo, CXII. 17.). (e) Pramana-vinischaya-tika--It is a commentary on Dharmakirti's Pramana-vinischaya. Durveka has mentioned it as 'Vinischaya-tika".3 It is not available in original Sanskrit. Its translation in Tibetan by Parahitabhadra, a Pandita of Kashmir and Blo-etn-sesa-rab, a Tibetan Lama is available. (Stan-hgyurmdo, CIX, CXI.). 4. Nyaya-bindu-purva-paksha-sankshepa It is a treatise by Kamalasila. He is regarded as a pupil of the famous Acharya santarakshita and hence his contemporary. He was born near about 713 A.D. as has been indicated by Dr. Bhattacharya.4 He has also composed a commentary on the Tattva-sangraha. Both these commentaries have been translated into Tibetan. The Purva-paksha-sarik sepa is not available in original Sanskrit. Its name indicates that it has been devoted to the study of purvapakshas. 5. Nyaya-bindu-pindartha :-Its author is Jinamitra. His date, according to Rahulji, is 825 A.D.,5 whereas it is 1025 A.D. 1 Ibid, p. 12. 2 History of Indian Logic, p. 330. 3 Dhar mottara-pradipa, pp. 3, 33, 41, 44, 70, 72, 73. 4 Tattva-sangraha, Intro. p. XIX. 5 Vada-nyaya, Appendix, p. IX.