Unpublished paper, 'The applicability of gelatine paper as a medium for colouring light' by Horace B [Benge] Dobell Dobell shares three key objectives in his paper: to point out the properties of a material called gelatine paper which render it applicable as a medium for colouring light; through the means of gelatine paper, to introduce the use of coloured light in the arts for the preservation of the sight of artisans; and to introduce the use of gelatine paper for the relief of persons suffering from impaired vision. Annotations in pencil and ink throughout. Subject: Optics Received 9 November 1854. Communicated by James Paget. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 7 of the Proceedings of the Royal Society as 'On the applicability of gelatine paper as a medium for colouring light'. August 1854