A like use of the suspended ring, indicating the early acquaintance of practitioners in these arts with one of the alleged evidences of the so-called _odylic_ force, is thus described by Peucer among various modes of hydromancy: "A bowl was filled with water, and a ring suspended from the finger was librated in the water; and so, according as the question was propounded, a declaration or confirmation of its truth, or otherwise, was obtained. If what was proposed was true, the ring, of its own accord, without any impulse, struck the sides of the goblet a certain number of times. They say that Numa Pompilius used to practise this method, and that he evoked the gods, and consulted them in water, in this way." _Crystallomancy_ is the art of divining by figures, which appear on the surface of a crystal ball, in like manner as on the phial filled with water. Concerning this practice, Delrio has the following remarkable passage, citing his contemporary, Spengler: "A man well versed in the Greek and Latin fathers, and happy, if he had not presumed, with unclean hands, to dabble in the mysteries of our faith (Spenger), has published in Germany a learned commentary on the nature of demons, which he has prefixed to Plutarch’s Essay, _De Defectu Oraculorum_. From this (says Delrio) I extract, in his own words, the following narrative. There are some (he says) who, being consulted on matters unknown, distinctly see every thing that is inquired after in _crystals_; and a little further on proceeds to state, that he once had an acquaintance, a man of one of the best families of Nuremberg, and that this acquaintance of his came to him on one occasion, bringing with him a crystal gem, of a round form, wrapped up in a piece of silk, which he told him he had received from a stranger, who encountering him several years before in the market-place, had asked his hospitality, and whom he had brought home with him and lodged for the space of three days; and that when the stranger was departing, he had left him the crystal as a present, in token of his obligation, and had taught him the use of it; thus, that if there was any thing he particularly wished to be informed of, he should take out this crystal and desire a pure male child to look into it and say what he should see there; and that it would come to pass that whatever he desired to be informed of, would be indicated by appearances seen by the boy. And he affirmed that he never was deceived in any instance, and that he learned matters of a wonderful kind from the representations of those boys, although no one else, by the closest inspection, could see any thing except the clear and shining gem. At a certain time, however, when his wife was pregnant of a male child, appearances were visible to her also in the crystal. First of all, there used to appear the form of a man clad in the ordinary habit of the times, and then would open the representation of whatever was inquired after; and