Henderson, C. Hanford (Charles Hanford), 1861-1941, Woodhull, John F. (John Francis), 1857-1941 · New York, D. Appleton and company · leaf 363
lso have thepower to effect chemicalchanges in a photographicplate. All bodies are trans-parent to these rays, butin varying degrees. If, forexample, we lay a handupon the holder contain-ing a photographic plate,and let the Eontgen raysfall upon the hand, andthen develop the plate, wefind that the… … Fig. 237.- -Photograph by Eontgenrays. REFRACTION OF LIGHT 341 was effected in the plate underneath these different partsof the hand (Fig. 237). Thus surgeons may locate a for-eign body, such as a bullet, in the flesh without probingfor it; and thus, too, they may locate abnormal growths,such as…
Physics
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