In attempting to use safety-razor blades in surgical work I hfound a stock razor bladazorth ade with a straight cutting edge is not practical. Such a blade if held in the usual position will have only the distal corner in contact with the flesh and will tear rather than cut, especially if used in theideeper parts of a wound. If the detachable razor blade is t deeper parts of a wound. If the detachable razor blade is to bedapted to the susurgeon's scalpel narily made s ordied withmade cannot be used with entire success, but must be specially ground with a rounded extremity or "belly" as in the usual type of scalpel. The accompanying illustration shows the instrument as I have modified it to meet this requirement. the instlment modifiedeet this requirement.