Abstract
WITH reference to Mr. Porter's letter regarding the amount of electric energy and exposure required for obtaining photographs by the Röntgen method, I may mention that against his photograph taken with a 3-inch coil and four minutes' exposure, I can instance a successful human foot that shows the bones very distinctly almost up to the ankle-joint, in taking which I used a 10-inch coil working at about half power without Leyden jars, and for which fifty-five seconds' exposure proved ample.
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SWINTON, A. The New Actinic Rays. Nature 53, 340 (1896). https://doi.org/10.1038/053340c0
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DOI: https://doi.org/10.1038/053340c0
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