Miles D., æt. 19 years, a clerk, in good general health, was stabbed in the middle of the thigh with a pocket knife. The knife blade was about three inches long and three-fourths inch wide. It penetrated its length and divided the left femoral artery and vein beneath the sartorius muscle. The haemorrhage was sudden and appalling. The boy who struck the blow was spattered with blood, notwithstanding the wounded thigh was enveloped in pants and drawers. The wounded boy had knowledge and presence of mind sufficient to thrust his finger into the wound, and so restrain, in a measure, the hæmorrhage until a physician could be summoned and arrive. Dr. F. W. Owen, of this city, responded to the call, and reached the patient within five minutes after the wound was received. He at once corded the thigh, compressing the femoral artery in Scarpa's triangle, summoned the Emergency Hospital