Paper, 'On the molecular mobility of gases' by Thomas Graham Final page is envelope addressed to Taylor & Francis [publishers] at Red Lion Court, Fleet Street, London and postmarked 12 August 1863 from Cambridge. Subject: Chemistry Published in Philosophical Transactions as 'On the molecular mobility of gases'. Received by the Royal Society on 7 May 1863. Read 18 June 1863. 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 12, 1863. [1863]