_In the majority of instances syphilis is a curable disease._ A patient should be first impressed with the necessity of faithfully following the directions of his physician, and continuing under treatment for a period of at least three years after the disappearance of the last manifestation of the disease. The disease is curable, but only by the judicious combination of two principal remedies, _i. e._, _mercury_ and _iodine_. Those rare instances in which cure seems to have followed lines of treatment which do not include the use of these two drugs are so exceptional and misleading that they should not be considered criteria. Mercury and iodine are powerful remedies, needing to be administered with caution and judgment. Unfortunately there is no arbitrary limit of time for any given case. The time stated above is that usually considered requisite. While syphilis may be curable in some cases in less than the stated time, it is better to give it longer treatment than is absolutely required rather than the reverse. The treatment entails no unpleasant consequences. Warnings as to the approach of toxic symptoms from the drugs can be easily recognized. Of the two drugs the preparations of mercury are the more important. The surgeon may adopt as his motto, _mercury, more mercury, and again mercury_, and if he begins with this measure early in the disease he may be able to conduct it to a successful termination with but little resort to iodine. Iodine is effective rather in those cases where treatment has been begun relatively late, and where it seems necessary to make a double impression upon the disease.