Brachial plexus nerve block for operations on the arm is a form of regional anesthesia that has apparently found little favor in this country. This fact is somewhat surprising, as the procedure offers quite as striking advantages in its field as does the analogous sacral nerve block so popular in genito-urinary surgery. The most recent report, and in fact the only report other than those in specialized textbooks of the clinical application of brachial plexus block is that of Livingston and Wertheim.1They summarized the results in 1,000 cases reported in foreign journals, and added 105 of their own cases. Farr2has used the method many times. He states that it gives excellent anesthesia; its accomplishment is not difficult, and provided the injection is made slowly and with certain precautions, it is comparatively safe. The very satisfactory results that I have had with the procedure over a period