Paper, 'On the nature of sleep' by A P W [Alexander Philip Wilson] Philip Subject: Physiology Published in Philosophical Transactions as 'On the nature of sleep'. Received by the Royal Society on 26 January 1833. Read 7 March 1833. 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. [1833]