Unpublished paper, 'On the motions of the iris' by Bernard Edward Brodhurst Brodhurst shares three observations. First, he examines the iris in conjunction with the organic system of nerves. Secondly, he exposes the relation of the several nerves of the orbit in reference to the iris. Thirdly, by tracing the membrane through the lower orders of animals, he shows the influence of the ophthalmic ganglion upon the iris, and the necessity of its presence for the accomplishment of the motions of the membrane, i.e. contraction and dilatation of the pupil. Subject: Physiology / Optometry Received 29 November 1851. Read 26 February 1852. Communicated by Thomas Bell. Written by Brodhurst at 14 Brook Street, Grosvenor Square [London]. Whilst the Royal Society declined to publish this paper in full, an abstract of the paper was published in volume 6 of Abstracts of the Papers Printed in the Philosophical Transactions of the Royal Society of London [later Proceedings of the Royal Society] as 'On the motions of the iris'. November 1851