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190         THE MAGIC OF JEWELS AND CHARMS
filled with wine or water, the liquid being allowed to stand until it had absorbed the virtues of the earth ; it was then taken as a potion with good effects. The "tongues" and "eyes" were often dipped in wine or water and were sup­posed to transmit their curative powers to the liquid.69
In the fifteenth and sixteenth centuries a strange belief was prevalent among the ignorant to the effect that the fossil sharks '-teeth, the ' ' tongue-stones, ' ' were the teeth of witches who sucked the blood of infants; these "vampires" were called lamiœ in ancient times.70 Probably the fact that a certain species of shark bore the name lamia gave rise to this idea, which was therefore merely due to a confusion of names. Nevertheless we can easily understand that this popular belief added to the repute of the glossopetrm, for the more dreaded the object the greater the power it was cred­ited with possessing. In the seventeenth century De Laet (d. 1649), the Dutch naturalist and geographer, received in Leyden certain glossopetrœ sent him by a friend in Bor­deaux, who wrote that they would cure any one suffering from soreness of the mouth, whether this were the result of having eaten impure food, or were produced by some derangement of the secretions. The "tongues" were to be dipped in spring water and would cause bubbles to form therein; as soon as these disappeared, the water was to be used as a gargle, and the mouth was to be washed with it two or three times. De Laet's friend assured him that this treatment would cure the disorder in twenty-four hours.71
A seventeenth-century amulet of a fossil shark's tooth, mounted in silver and found in an excavation at Salzburg, Austria, was among the objects exhibited by the writer for the New York branch of the American Folk-Lore Society, in
• " Museum Wormianum," Lug. Bat., 1655, pp. 7-9.
m Aldrovandi, " Museum metallicum," Borioni», 1648, lib. iv, cap. 10, p. 600.
""Museum Wormianum," Lug. Bat., 1655, p. 65.