Sulphuric acid was formerly in very frequent use as an internal remedy for hemorrhage, especially of passive character, whether from the stomach, lungs, or uterus. That there is difficulty in explaining how it can exercise astringent effect after dilution and possibly combination in the blood, would be no argument against its use if this were proved efficacious; but my experience is the same as that of many modern observers (among whom I may mention Nothnagel and H. C. Wood), who give to sulphuric acid a secondary place among haemostatics, although I have known it succeed sometimes when other remedies have failed.