Paper, 'On the constitution of the resins, Part IV' by James F W [Finlay Weir] Johnston Subject: Botany Published in Philosophical Transactions as 'On the constitution of the resins. Part IV'. Written by Johnston in Durham. Received by the Royal Society on 16 March 1840. Read 9 April 1840. 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 4, 1843. 13 March 1840