. The Röntgen rays in medical work . eet high. The wiresfrom the coil may be led directly to theends of the upper cross-bar, or one mayfirst be taken to a galvanometer and avalve tube, as shown in the other wires lead from the ends ofthe cross-arm to the terminals of thetube. Another useful and lighter stand isshown in Fig. 51. It is of wood, andcarries a cross - arm for supporting thewires, and has a very good ball-and-socket attachment, which permits ofgreat latitude in the placing of the tube. (See also Fig. 57.) In some situations a tube-holder attached to the wall is useful,an
. The Röntgen rays in medical work . eet high. The wiresfrom the coil may be led directly to theends of the upper cross-bar, or one mayfirst be taken to a galvanometer and avalve tube, as shown in the other wires lead from the ends ofthe cross-arm to the terminals of thetube. Another useful and lighter stand isshown in Fig. 51. It is of wood, andcarries a cross - arm for supporting thewires, and has a very good ball-and-socket attachment, which permits ofgreat latitude in the placing of the tube. (See also Fig. 57.) In some situations a tube-holder attached to the wall is useful,and Fig. 52 shows an ingenious holder for that purpose. Couch fOF X-Ray Work.—Many forms of special couch havebeen devised for x-ray work. In most of them the tube is fixedbeneath, and the examination is conducted with the patient in therecumbent position, while the screen or photographic plate is most screen examinations, except, perhaps, in simple inspec-tions of the upper limb, it is a convenience to have the patient in. Fig il.—Portable Tube-Stand (Cox). THE ELECTRICAL APPARATUS S7 the horizontal position. The tube is fixed on a carriage, movingupon guides beneath the couch, so as to traverse in all directions
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