The problem of the ununited fracture is one that I brought before the Section on Orthopedic Surgery in 1921, reporting 247 ununited fractures, and again in 1923, discussing the treatment of 220 patients who had fractures in a fixed state of nonunion; both of these series of cases were encountered at the Mayo Clinic. Basing this paper on material encountered in the same institution, I venture to discuss again the treatment of ununited fractures and am reporting the results in treatment of 336 traced patients of a total of 374 who have been operated on since my last report. My reason for this presentation is that at the clinic with increased experience we have evolved a comparatively simple technic that gives a higher percentage of good results than we have heretofore obtained. Experience has taught us that the larger the graft, the better the chances of success. We have termed