DURING the past four years, section of the vagus nerves to the stomach as a method of treatment has been carried out at the University of Chicago in 250 patients with various types of peptic ulcer. The technics employed have been described elsewhere.1 The clinical results following this method of treatment have been so satisfactory that it has replaced all other types of surgical treatment for this disease on our service. One patient in this series died of pneumonia, making a mortality of 0.4 per cent. Physiologic tests on 170 patients on whom the operation was performed by us have revealed that the section of the vagus nerves was probably incomplete in 18 cases. In this group, 6 patients have complained of recurrent or persistent symptoms of ulcer, and in 2 of these an undamaged vagus fiber was found at a second operation. Division of this nerve was followed