Unpublished paper, 'Constants of explosion of cordite and of modified cordite' by Robert Robertson Robertson aims to determine, under the conditions of pressure obtaining in a gun, the constants of explosion of cordite and of modified cordite, with special reference to the effects produced by the non­explosive ingredients, mineral jelly and acetone. Includes five diagrams and two photographs of experimental apparatus. Subject: Chemistry Received 10 January 1906. Read 8 February 1906. Communicated by [Henry Capel Lofft] Holden. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 79 of the Proceedings of the Royal Society A as 'Constants of explosion of cordite and of modified cordite'. 21 March 1905