LVIII.Experiments on the photographic effect of X-rays

Abstract
Experiments on the change of photographic density, due to monochromatic X-rays, show that the density is directly proportional to the intensity of the radiation and to the time of exposure, provided the density is not greater than about 1·4. The variation of D with I has been tested by an absorption method, in which the films themselves provide the absorbing medium; this method does not appear to have been used previously.

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