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 184
n o V E i>i c5Uav;ufla _____J•J M ^^^ oHlawvUa … Fig. 80. It permits the determination of the following fourquestions:— (1) The point vertically below the foreign body. (2) 160 Practical Radiography The size of same. (3) Vertical distance of foreign bodyabove screen. (4) Distance apart of two objects (evenwhen above each other). To determine…
Radiography · X-rays
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