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INTRODUCTION.
Quite recently a leading Medical Journal has pertinently asked—" Is it not of timely interest to enquire,—having before our notice the results of modern investigations into radio-activity, and force-rays,—whether, after all, Precious Stones may not be capable of exerting thera­peutic influences ? The astute Physician should not altogether overlook the part taken by Gems in the kaleidoscopic variation of human sentiments, and the evolution of personal sympathies." " It may be that the practice of wearing Gems in olden times as amulets, and charms, to ward off disease, and other evils, was really the origin of their after-use as remedial agents, which grew to a considerable extent in the Middle Ages." Galen records that the Egyptian King Nechepsus wore a green Jasper cut into the shape of a dragon surrounded with rays, which being thus applied over the region of his digestive organs was found to be wonderfully
strengthening to their functions. Again, the Diamond,
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