Paper, 'On the discordances between the sun's observed and computed right ascensions as determined at the Blackman Street Observatory, in the years 1821 and 1822; experiments to shew that they do not originate in instrumental derangement; also a description of a seven-feet transit with which the observations were procured, and upon which the experiments were made' by James South Illustrations for this paper have been separated from the manuscript and are found at PT/73/12/16. Subject: Astronomy Published in volume 116 of Philosophical Transactions as 'On the discordances between the sun's observed and computed right ascensions, as determined at the Blackman-street observatory, in the years 1821 and 1822; with experiments to show that they did not originate in instrumental derangement. also a description of the seven-feet transit with which the observations were procured, and upon which the experiments were made'. Read 8 June 1826. 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 2, 1833. 1 June 1826