No other surgical operation has been more thoroughly studied than has intestinal anastomosis. Parker and Kerr,1who reviewed the literature in 1908, found that more than 200 methods of performing it had been described! Its basic principles have been established for nil time. Asepsis is only a refinement in technic, in many cases impossible to secure. Therefore, surgeons will be slow to adopt aseptic methods which differ widely from non-aseptic methods shown by long trial to be safe and practical. For these reasons I concluded that in this experimental study I could best direct my efforts toward improving the technic of well-known methods of lateral and of end-to-end anastomosis so as to make it aseptic, instead of trying to devise totally new operations in a field of surgery in which almost every possible operation has already been described. To be more concrete, I selected a standard method of lateral