A well-known lady in New York City, in conversation with the writer, a few years ago, on the subject of crystal balls, was advised by him to try a ball herself and see what results she obtained. At the end of two years she found that by concentration she had been able to better her understanding of herself; and this effect is not only obtainable now by means of a crystal ball, but by fixing her gaze upon any bright object. This visual fixation has centred her whole being in such a way that her health has notably improved. What are the laws that govern the production of these phenomena? That the “visions” are real enough has been proven time and again, but it seems almost certain that they do not offer anything but the ideas or impressions existing in the minds or optic nerves of the gazers. One of the most painstaking students of the subject, Miss Goodrich-Freer, gives many instances in proof of this, which show how easy it would be for a less critical observer to suppose that the crystal revealed something unknown to the gazer. On one occasion this lady was at a loss to remember the correct address of a friend whose letter, received a few days before, she had torn up. She resorted to her crystal, and after a few minutes saw in it, in gray letters on a white ground, the address she had forgotten. She mailed her answer to this address, and the reply came duly to hand, with the address stamped in gray upon the white paper of the note, which was identical with that she had first received.[310] The visual impression had been stirred up and “externalized” itself when she gazed upon the crystal. We believe that this explains the larger number of such visions, and that the rest are only inexplicable because the scryer has forgotten the source of the impression that is projected on the surface of the crystal. [Illustration: ROCK-CRYSTAL SPHERES. JAPANESE. (See page 217.)] It is true that both Miss Goodrich-Freer and many other crystal-gazers note instances in which the vision appears to represent something the scryer does not and cannot know. However, even in these cases, when carefully examined, there is little difficulty in finding an explanation. Coincidence accounts for much, and imagination for more, since it is not the vision itself, but the memory of the vision, that is later brought into comparison with actual facts. We all know how exceedingly hard it is to repeat, after a short lapse of time, all the circumstances and details of any occurrence. There is a natural growth and modification of mental impressions, due to association of ideas, and where there exists the least wish to make the prophecy accord with the event, or the vision with the coincident happening, this growth and modification will be in the direction of agreement. This takes place quite unconsciously, and the informant will be fully persuaded that all the circumstances are related exactly as they occurred.