Mowat, Harold, 1883- · London : H. Frowde · leaf 89
Fig. 21. Mackenzie Davidson X Thread Localizer.For use in conjunction with Head Localizing Apparatus. The plate is placed on it with the film side upwardso that the cross wires are superimposed upon thecross lines of the localizer. If it has been necessary,because of the thickness of the…
X-rays
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