I shall describe each of these three classes, with their many variations, as we reach them in their proper places in these lessons.  Before doing so however, I wish to explain to you the several methods by which clairvoyant vision is usually induced.  These methods may be designated as follows: 

(1) Psychometry, or the method of getting en rapport with the astral plane by means of some physical object connected with the person, thing, or scene about which you desire to be informed.

(2) Crystal Gazing, etc., or the method of getting en rapport with the astral plane by means of gazing into a crystal, magic mirror, etc.

(3) Clairvoyant Reverie, or the method of getting en rapport with the astral plane by means of psychic states in which the sights, sounds and thoughts of the material and physical plane are shut out of consciousness.

I shall now proceed to give the details regarding each one of these three great classes of methods inducing clairvoyant vision, or en rapport conditions with the astral plane.

Psychometry.  Psychometry is that form of clairvoyant phenomena in which the clairvoyant gets into en rapport relation with the astral plane by means of the connecting link of material objects, such as bit of stone, piece of hair, article of wearing apparel etc., which has had previous associations with the thing, person or scene regarding which clairvoyant vision is required.

Without going into technical occult explanations, I would say that the virtue of these articles consists entirely of their associative value.  That is to say, they carry in them certain vibrations of past experience which serve as a connecting link, or associated filament, with the thing which is sought to be brought into the field of clairvoyant vision.

To reach clairvoyantly a thing, scene, or person in this way is akin to the unwinding of a ball of yarn, when you hold the loose end in your hand.  Or, it is like giving a keen-scented dog a sniff at a handkerchief once carried by the person whom you wish him to nose out for you.

A well-known authority on the subject of psychic phenomena has said on this point:  “The untrained clairvoyant usually cannot find any particular astral picture when it is wanted, without some special link to put him en rapport with the subject required.  Psychometry is an instance in point.  It seems as though there were a sort of magnetic attachment or affinity between any particle of matter and the record which contains its history—­an affinity which enables it to act as a kind of conductor between that record and the faculties of anyone who can read it.  For instance, I once brought from Stonehenge a tiny fragment of stone, not larger than a pin’s head, and on putting this into an envelope and handing it to a psychometer who had no idea what it was, she at once began to describe that wonderful ruin and the desolate country surrounding it, and then went