Paper, 'On the geometrical representation of the expansive action of heat, and the theory of thermo-dynamic engines' by William John Macquorn Rankine 93 manuscript pages and six plates showing graphs of the expansive action of heat and thermodynamic engines. Subject: Physics / Mathematics Published in Philosophical Transactions as 'On the geometrical representation of the expansive action of heat, and the theory of thermo-dynamic engines'. Written by Rankine in Glasgow. Received by the Royal Society on 5 December 1853. Read 19 January 1854. 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 6, 1854. 3 December 1853