One of the most important tasks in hospitals here is the localization of foreign bodies. Many methods are being used. The one which I am employing is to my mind the most simple and the most accurate. It involves the use of a small apparatus with an aluminum base which rests underneath the part of the patient which contains the foreign body, and an upright standard which rests on the broad end of the aluminum base. This standard has two adjustable cuffs through which pass two rods, an upper and a lower. The upper rod has a loop on its end; the lower, a small metallic ball. These rods are adjustable in two directions, and are secured by two set screws.
A patient is placed on the aluminum base (the tube, of course, being underneath the table), the foreign body is located, and by the central rays the loop is