Paper, 'On the theory of the perturbations of the planets' by James Ivory Subject: Astronomy Published in Philosophical Transactions as 'On the theory of the perturbations of the planets'. Read 19 January 1832. Abstract published in Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society of London], Volume 3, 1837. 22 December 1831