Unpublished paper, 'On the gyroscope' by Arthur Hill Curtis Curtis aims to deduce, on strict mechanical principles, all the known properties of the gyroscope. The only assumption made is that the velocity of rotation impressed on the instrument is very great compared with that which the attached weight would produce on it if acting alone for an instant in a direction perpendicular to the axis. Annotations in pencil throughout. Marked on front as 'Archives G G S [George Gabriel Stokes] 13 June [18]61'. Includes three geometrical figures describing gyroscope motion. Subject: Scientific apparatus and instruments Received 20 September 1860. Communicated by [George] Boole. Written by Curtis at Queen's College, Galway [Ireland]. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 10 of the Proceedings of the Royal Society as 'On the gyroscope'. 10 August 1860