John M., age 47, but appearing at least 67, presented himself at the Wills Eye Hospital Dec. 12, 1892, bearing a letter from his physician, Dr. 1). T. Lainé of Media, Penn., under whose care he has been for a severe attack of iritis in the left eye. The disease proving rebellious, he was advised to seek hospital treatment. He was in feeble health, suffering from severe pain in the eyeball and with violent left hemicrania; vision was reduced to quantitative perception of light. There was deep ciliary injection, small pupil, slight haze of the cornea and the remnant of a blood clot was still lying in the lower angle of the anterior chamber. There were numerous posterior synechia and dilated blood vessels could be seen coursing over the surface of the iris. Tension was normal but the anterior chamber shallow. He was placed in bed, blood extracted from the