=The Teeth.=--The permanent teeth often show peculiar changes that are distinctive, especially in those who have shown signs of corneal involvement, which, having been first described by Hutchinson, are frequently alluded to as _Hutchinson’s teeth_. When they first appear they are smaller than natural and irregular. Later they become notched. The crescentic notches show best upon the incisor teeth. Sometimes the canines are also affected, being narrow, rounded, and peg-like, with jagged edges. These teeth are usually so formed that they do not meet properly, and so small that they scarcely touch each other. The most characteristic changes are met with in the upper incisors, which may be affected when all the others are fairly normal. In such cases they will be found narrow and short, with a single broad notch at the edge, with perhaps a furrow passing from it upward and on both anterior and posterior aspects. Notching is usually symmetrical. No conclusions can be drawn from the teeth if they are normal, as they may be, but when they present the above-described features they prove a very important indication. The relations between syphilis and rickets have attracted much attention, and there is little doubt but that rachitic changes are prone to occur in subjects with inherited syphilis. The two conditions are sometimes blended in various degrees and ways, and yet it is not safe to say that rickets is always an expression of inherited syphilis. TREATMENT OF SYPHILIS. There is no question but that some of the above-described lesions constitute as disgusting and repelling diseased conditions as the physician or surgeon is ever called upon to treat. In spite of these circumstances, however, it is generally believed that syphilis is a most satisfactory disease to treat. This is because of the almost mathematical certainty with which results can be predicted and estimated. There is nothing more satisfactory in therapeutics than the rapidity with which many pronounced and serious manifestations of syphilis will disappear under the influence of proper treatment. These statements, however, should be modified to make room for exceptional cases, where the disease assumes a malignant type, owing probably to some defect in the patient’s constitution, or where patients show peculiar idiosyncrasies and susceptibilities to the influence of mercury and iodine. Such cases happen occasionally and prove difficult of solution, while they sorely try the surgeon’s ingenuity and resources.