Structure and functions of the human eye, with the effects of artificial light upon it, and the best means of preserving sight: being the substance of two popular lectures, delivered in the Music-Hall, Belfast, on the evenings of the 21st and 23rd of October, 1851, in aid of the Eye and Ear Dispensary: by Samuel Browne, R.N., M.R.C.S., Surgeon to the Belfast General Hospital and Ophthalmic Institution, and which are published for the benefit of the same charitable establishment. 1852