As for that _Indian_ Stone that shined so brightly in the Night, and pretended to have been shewn to many in the Court of _France_, as _Andreus Chioccus_ hath declared out of _Thuanus_, it proved but an imposture, as that eminent Philosopher _Licetus_ [SN: Licet de quæsit. per Epistolas.] hath discovered, and therefore in the revised Editions of _Thuanus_, it is not to be found. [SN: Licet de lapide Bononiensi.] As for the _Phosphorus_ or _Bononian_ Stone, which exposed unto the Sun, and then closely shut up, will afterward afford a light in the dark; it is of unlike consideration, for that requireth calcination or reduction into a dry powder by fire, whereby it imbibeth the light in the vaporous humidity of the air about it, and therefore maintaineth its light not long, but goes out when the vaporous vehicle is consumed. 9. Whether the _Ætites_ or _Eagle_-stone hath that eminent property to promote delivery or restrain abortion, respectively applied to lower or upward parts of the body, we shall not discourage common practice by our question: but whether they answer the account thereof, as to be taken out of _Eagles_ nests, co-operating in Women unto such effects, as they are conceived toward the young _Eagles_: or whether the single signature of one stone included in the matrix and belly of another, were not sufficient at first, to derive this vertue of the pregnant Stone, upon others in impregnation, may yet be farther considered. Many sorts there are of this ratling Stone, beside the _Geodes_, containing a softer substance in it. Divers are found in _England_, and one we met with on the Sea-shore, but because many of eminent use are pretended to be brought from _Iseland_, wherein are divers airies of _Eagles_, we cannot omit to deliver what we received from a learned person in that Country, [SN: Theodorus Ionas Hitterdalæ Pastor.] _Ætites an in nidis Aquilarum aliquando fuerit repertus, nescio. Nostra certè memoria, etiam inquirentibus non contigit invenisse, quare in fabulis habendum_. 10. Terrible apprehensions and answerable unto their names, are raised of _Fayrie_ stones, and _Elves_ spurs, found commonly with us in Stone, Chalk, and Marl-pits, which notwithstanding are no more than _Echinometrites_ and _Belemnites_, the Sea-Hedge-Hog, and the _Dart_-stone, arising from some siliceous Roots, and softer then that of Flint, the Master-stone, lying more regularly in courses, and arising from the primary and strongest spirit of the Mine. Of the _Echinites_, such as are found in Chalk-pits are white, glassie, and built upon a Chalky inside; some of an hard and flinty substance, are found in Stone-pits and elsewhere. Common opinion commendeth them for the Stone, but are most practically used against Films in Horses eyes.