DURING the past eight yearsI have had under my care, including both hospital and private patients, I70 cases of sarcoma. This large. number of cases, of which I have careful histories, has given me an exceptional opportunity for studying the clinical features of this disease, and no feature, I may say, has impressed me more strongly than the frequent association of trauma with its early manifestations. In consult-ing the literature of the subject I find that there is a wide divergence of opinion, both as to the real facts and still more as to the probable explanation of these facts. It is only by collecting and analyzing a large number of more or less closely related facts that we are able to reach important generalizations.

I believe that the subject under discussion has a most important bearing upon the etiology of sarcoma, and any-thing that can throw light upon this ought to be welcomed. Another aspect, which has of late aroused considerable interest among the German surgeons, needs but to be men-tioned to show its practical importance. This is the matter of accident insurance. If sarcoma in a large proportion of cases is really the result of an injury or an accident, the com-panies are liable; if not the result of an injury, they are not. Much is involved in settling this point. The present