Practical radiography : a handbook for physicians, surgeons, and other users of X-rays (1901)
Isenthal, A. W, Ward, H. Snowden (Henry Snowden), 1865-1911 · London : Published for The Photogram, Ltd. by Dawbarn and Ward, Ltd. · leaf 189
tical Radiography After development, the negative showing the orientationcross, the quadrant mark and two shadows of the object tobe localized, is placed upon a glass plate, illuminated frombelow and having two diamond scratches which serve tobring the negative into register. From the points… … Fig. 84. point of intersection in space located, and recorded bymeasuring its distance from the planes of the orientationmark, and from the plate itself. A simple gauge or a pairof compasses may be employed. The threads are then stretched to the two other endsof the shadows, and the process of…
Radiography · X-rays
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