Once developed, there seems to be little hope for cure of aneurism of the aorta. Amelioration may be afforded, perhaps for a long period, by the introduction of gold wire and the passage of a galvanic current, and some good results have been reported from the use of gelatin subcutaneously. The prognosis is, however, never encouraging, and more is to be hoped for, in this instance, as in many others, from prophylactic measures rather than the treatment of the developed condition. Of the various causes that have been held responsible for aortic aneurism, by far the most important is syphilis, and the recognition of this fact means that the physician especially must do all in his power to prevent the spread of this disease, and to insist on its thorough and long-continued treatment when it occurs. Modern medicine is preventive medicine. Dr. Hans Arnsperger1 has analyzed 37 cases of aneurism