Many publications are available from Research Gate :


Articles already published in the Indian Journal for the History of Science :


‘Newly discovered mathematical relations between Greek and Indian astronomy’, Indian J. History of Science, 12(1977) 120-6. download

‘The astronomical tables of Rājah Jai Singh Sawā’ī’, Indian J. History of Science 19(1984) 143-171. download

‘Account by Joseph Dubois of astronomical work under Jai Singh Sawā’ī’, Indian J. History of Science, 28(1993) 157-166. download


Chapter on Geodesy for the History of Cartography, Volume 2 Book 1, download.

            Other chapters are freely available from


From Traditions of Science: Cross-cultural perspectives, Festschrift for Prof B. V. Subbarayappa, 2007

‘Astronomical Computation for the History of Indian Astronomy’ download


From Academie Internationale d’Histoire des Sciences 26 (1976) 197-220, 27 (1977) 33-71, ‘Studies in the medieval conception of precession’



From the Corpus des Astronoms Byzantins Volume vii, 1994,

            An Almanac for Trebizond for the year 1336 download


From the Feschrift for Paul Kunitzsch

‘From Tantra to Zīj’, in Sic itur ad astra. Studien zur Geschichte der Mathematik und Naturwissenschaften.

Festschrift für den Arabisten Paul Kunitzsch zum 70. Geburtstag. Edited by Menso Folkerts and Richard Lorch. Harrassowitz (Wiesbaden), 2000; pp. 451-460.