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 182
Tube very far away.Fig. 76. Localization 157 era … 158 Practical Radiography this intelligible; with the source of radiation near, theprojection assumes a composite character, whilst if thesource were at infinity (parallel rays) we would obtaintrue outlines. We must thus only employ the parallel rays, i.e.,exclude for our examination all the rays…
Radiography · X-rays
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