The following appeared originally in the Siddhanta Dipika, Madras Review and the New Reformer and they represent my father's contribution to the study of Siddhanta during the last Fourteen years, besides his translations of Šivajñānabodham, Šivajñāna Siddhiyār, Tiruvarutpayan and Tirumular's Tirumantiram etc. and embody his critical researches and deep learning in the field of Indian Religion and Philosophy. As the earlier volumes of the Siddhānta Dipikā are out of print, these are now published in a collected form for the first time at the pressing request of numerous readers of the Siddhānta Dlpikā. I hope to issue as soon as possible the other works of my father. I hope that my father's great labours in the field of South Indian Literature, Philosophy and Religion will be fully appreciated by the ready sale of this edition.

Madras J. N. RAMANATHAN.