The Notion of Science According to Bernai Delhi Science Forum 3 Some Issues in Historiography in Bernal's Science and History V.N. Deshpande 13 Science, Falsification and Ideology P. Purkayastha 22 Are Scientific Theories Incommensurable? V. Sudhakar 31 Copernicus, Columbus, Colonialism and the Role of Science in Nineteenth Century India S. Irfan Habib, Dhruv Raina 51 The Physicalist Paradigm in Economic Planning Sukumar Muralidharan 67 The Abstract and the Concrete in the Definition of Space and Time K. Theckedath 76 Walking on Three Legs: Science, Commonsense and Ideology D. Raghunandan 92 Book Review 101 190- 191