AT THE TIME of the inception of this study an adequate partial gastrectomy was the standard procedure used in the treatment of patients with peptic ulcer requiring surgical treatment in this hospital. It was our opinion, in view of the frequent necessity to use supplemental vagotomy and the paucity of long term results for interpretation, that the latter procedure was to be considered at this time as an adjunct in peptic ulcer therapy, and it seemed most plausible to use it as such along with the procedure which in our hands and in the hands of others had heretofore given the best results. It was our purpose to determine whether the addition of vagus neurectomy could improve our results in the surgical treatment of duodenal ulcers sufficiently to make it a practical supplement in future therapy. Operations other than partial gastrectomy allow acid and pepsin secreting glands to remain in