In the magical tradition of Europe and the Near East (see: Magic in the Greco-Roman world), the aetites (singular in Latin) or aetite (anglicized) is a stone used to promote childbirth. It is also called an eagle-stone,The eagle-stone is defined as "the common name of the aetite" by Thomas Wright, Dictionary of Obsolete and Provincial English (London, 1886), p. 414 online. aquiline, or aquilaeus. The stone is said to prevent miscarriage and preterm birth, while shortening labor and birth for a full-term birth.
From Theophrastus onwards, the belief is also recorded that the stone had the ability to "give birth" to other stones, based on the crystals found within. This fed into the belief that at least some minerals could be gendered into male and female forms.Harris, 47-48
The American Geosciences Institute defines the eaglestone as "a concretionary nodule of clay ironstone about the size of a walnut that the ancients believed an eagle takes to her nest to facilitate egg-laying."
Pliny the Elder describes four types of aetites in his Natural History and outlines their magico-medical use:
Pliny says that the stone is found in the nests of , who cannot reproduction without them.
The fourth-century magico-medical text Cyranides also claims that the aetite worn as an amulet can prevent miscarriage caused by female such as Gello.Sarah Iles Johnston, Restless Dead (University of California Press, 1999), p. 167.
The aetite appears in a Spanish work on natural magic by Hernando Castrillo, first published in 1636.Lynn Thorndike, A History of Magic and Experimental Science, p. 334. Alvaro Alonso Barba's work on metallurgy (Madrid, 1640) touts the efficacy of the aetites, advising that the stone be tied to the left arm to prevent spontaneous abortion, and to the right arm for the opposite effect. The work was widely reviewed, reprinted and translated.Full title Arte de los metales en que se enseña el verdadero beneficio de los de oro y plata por açogue. El modo de fundir los todos y como se han de refinar y apartar unos de ostros. Thorndike, pp. 258 and 260.
The 1660 book Occult Physick said the aetite
Aetite, along with hematite, was the subject of a 1665 book by J.L. Bausch, City physician (Stadtphysikus) of Schweinfurt and founder of the German National Academy of Sciences Leopoldina. Bausch, however, cautions that empty promises of the stone's powers exceed the limits of both medicine and nature.Full title in Latin Scediasmata bina curiosa de lapide haematite et aetite ad mentem Academiae Naturae Curiosorum congesta. Thomas Browne affirmed the stone's application to obstetrics in his Pseudodoxia Epidemica (1672), but doubted the story about eagles.Thomas Browne, Pseudodoxia Epidemica (1672) II. v. 9, as cited by Stol, Birth in Babylonia and the Bible, p. 50, note 15.
The stones were expensive; in Scotland, Anna Balfour included her stone as a bequest in a will,William Fraser, Memorials of the family of Wemyss of Wemyss, vol. 2 (Edinburgh, 1888), pp. 232-3. and English women borrowed and shared these stones to use as amulets in pregnancy.
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