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 188
ires appear on the radio-gram, and being previouslypainted with some dye, theymark themselves on the bodyof the patient. One of thefour quadrants is then markedby placing a coin or similaropaque object upon the plate,the tube is shifted from the medium position through acertain measured distance… … Fig. 83. 162 Practical 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…
Radiography · X-rays
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