Paper, 'On an inequality of long period in the motion of the earth and Venus' by George Biddell Airy Subject: Astronomy Published in Philosophical Transactions as 'On an inequality of long period in the motions of the Earth and Venus'. Written by Airy in the Observatory, Cambridge. Read 24 November 1831. 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. 8 November 1831