the _rapport_ existing between the sensitive patient and foreign bodies when in proximity or contact; as for example, when a bottle containing a poison was taken at random from among a number of others of exactly similar appearance, and applied to the back of the patient's neck, the hypnotised subject would once develop all the symptoms of poisoning by arsenic, strychnine, prussic acid, etc., it being afterwards ascertained that the bottle thus applied actually contained the toxine whose effects had been portrayed by the subject. It need not, then, be a matter of surprise to learn that the Crystal exerts a very definite and sensible effect upon the nervous system of a certain order of subjects. It does not affect all alike, nor act in exactly the same way on those whom it does so affect. Where its action is more or less rapid and remarkable, the quartz or beryl Crystal may be taken as the most effective medium for producing the vision. In other cases the concave mirror, either of polished copper or black japan, will be found serviceable for inducing the clairvoyant state. In some other cases, again, a bowl of water is sufficient. The ecstatic vision was first induced in the case of Jacob Boehme by the sun's rays falling upon a bowl of water which caught and dazzled his eyes while he was engaged in the humble task of cobbling a pair of shoes. As a consequence of this exaltation of the sense of sight we have those remarkable works, "The Aurora," "The Four Complexions," "The Signatura Rerum," and many others, together with a volume of letters and commentaries which, in addition to being of a highly spiritual nature, must also be regarded as scholarly when referred to their authorship. In cases like the above it may be said that the clairvoyant faculty is constitutional and already fully developed, waiting only the circumstances which shall serve to bring it into active play, Emanuel Swedenborg, if we remember rightly, was 54 years of age before he awoke to the consciousness of his spiritual vision. The medium employed for inducing the clairvoyant state cannot be definitely prescribed. It must remain a matter of experiment for each investigator. This, however, may be said: _Every person whose life is not wholly sunk in selfish and material pleasures, but in whom the aspiration to a nobler and purer life is a hunger the world cannot satisfy, has within himself the power to see and know that which he seeks behind the veil of his earthly senses. Nature has never produced a desire she could not satisfy. There is no hope, however vague, that the soul cannot define, and no aspiration, however high, that the wings of the spirit cannot reach. Therefore be patient and strive_.