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ON THERAPEUTIC USES OF STONES          369
qualities of precious stones for the cure or prevention of disease and the properly medicinal use of them as "mineral substances. In the former case the effect was attained by merely wearing them on the person, while in the latter case they were reduced to a powder, which was dissolved as far as possible in water or some other liquid and then taken internally. As, however, the end to be attained is the same whether the stone be worn or taken internally as a powder or liquid, it seems more logical to treat of both these methods of therapeutic use together, reserving for the chapter on the talismanic use of gems only their employment to avert misfortunes other than those caused by disease, and their influence in the procuring of wealth, honors, and happiness for their wearers.
The belief in the curative properties of precious stones was at one time universal among all those to whom gems were known. When we read to-day of the various ills that were supposed to be cured by the use of these gems, we find it difficult to understand what process of thought could have suggested the idea of employing such inef­fectual remedies. It is true that the constituents of cer­tain stones can be absorbed by the human body and have a definite effect upon it, but the greater part of the ele­ments are so combined that they cannot be assimilated, and they pass through the system without producing any apparent effect.
In ancient and medieval times, however, other than chemical agencies were supposed to be efficient in the cure of diseases, and the primitive animistic conception of the cause of illness, and hence of the therapeutics of disease, long held sway among those who practised the medical art. Remedies were prized because of their rarity, and also because it was believed that certain spiritual or
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