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"It seems incredible," I exclaimed, scarcely believing what I actually saw. "It is almost like second sight." Kennedy smiled. "Any letter written with ink having a mineral base can be radiographed," he added. "Even when the sheet is folded in the usual way, it is possible, by taking a radiograph, as I have done, stereoscopically. Then every detail can be seen standing out in relief.
"Any letter written with ink having a mineral basis can be radiographed," added Craig. "Even when the sheet is folded in the usual way, it is possible by taking a radiograph stereoscopically, to distinguish the writing, every detail standing out in relief. Besides, it can be greatly magnified, which aids in deciphering it if it is indistinct or jumbled up. Some of it looks like mirror writing.
He has been experimenting with the method of using X-rays recently discovered by a German scientist, by which radiographs of very thin substances, such as a sheet of paper, a leaf, an insect's body, may be obtained. These thin substances, through which the rays used formerly to pass without leaving an impression, can now be easily radiographed."
He has been experimenting with the method of using X-rays recently discovered by a German scientist, by which radiographs of very thin substances, such as a sheet of paper, a leaf, an insect's body, may be obtained. These thin substances through which the rays used formerly to pass without leaving an impression, can now be radiographed."
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