Professor Gonin reported a series of 300 cases of retinal detachments in which the patients were operated on by his method. His conclusions, being based on a large number of cases observed over a period of more than ten years, are naturally quite acceptable. With this series he reaffirmed his original conception that a tear or hole in the retina is the cause of the detachment, and that in recent cases the occlusion of this opening is sufficient to bring about a complete cure. A cure is obtained in 55 per cent of cases if treatment is applied within three weeks of the onset of the illness. In 15 per cent of Gonin's cases it was necessary to repeat the procedure, and the results were satisfactory. Of all the cases with a detachment of less than one year's duration, cures were obtained in 40 per cent. A recurrence