Paper, 'Some further observations on atmospherical refraction' by Stephen Groombridge Subject: Astronomy Published in Philosophical Transactions as 'Some further observations on atmospherical refraction'. Written by Groombridge at Blackheath. Read 31 March 1814. 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 1, 1832. 31 January 1814