While the general methods of manifesting these various forms of clairvoyant power are practically the same, yet the nature of these several forms of phenomena vary considerably, as we shall see when we come to consider them in detail in the following pages: this is particularly true in the case of the distinction between past-time clairvoyant phenomena, and future-time clairvoyant phenomena--the difference between the perception of what has been, and that which has not yet been. Present Clairvoyance. In what is called Present Clairvoyance the objects perceived by the clairvoyant are present in time and in space, at the moment and place of the perception, although invisible to normal sight. It is seen at once that if the object seen clairvoyantly is present in time and in space to the clairvoyant, and yet is incapable of being perceived by the normal sight of the clairvoyant, then that object must be capable of being perceived only through vibrations above the normal range of the human senses. Perhaps the precise nature of this class of clairvoyant perceptions will be better understood by a more detailed description of the objects actually perceived by clairvoyant vision of this mode of manifestation. The Human Aura. In the first place, this mode of clairvoyant vision discloses the interesting phenomena concerned with the human aura, or psychic atmosphere which surrounds the human body for a space of several feet, assuming an egg-shaped form. A writer says on this point: "The trained clairvoyant vision sees the human aura as a nebulous hazy substance, like a luminous cloud, surrounding the person for two or three feet on each side of his body, becoming more dense near the body, and gradually becoming less dense as it extends away from the body. It has a phosphorescent appearance, with a peculiar tremulous motion manifesting through its substance. The clairvoyant sees the human aura as composed of all the colors of the spectrum, the combination shifting with the changing mental and emotional states of the person. But, in a general way, it may be said that each person has his or her distinctive astral auric colors, depending upon his or her general character or personality. Each mental state, or emotional manifestation, has its own particular shade or combination of shades of auric coloring. This beautiful kaleidoscopic spectacle has its own meaning to the occultist with clairvoyant vision, for he is thus able to read the character and general mental states of the person by means of studying his auric colors. The human aura is not in a state of calm phosphorescence, however. On the contrary, it sometimes manifests great flames, like those of a fiery furnace, which shoot forth great tongues, and dart forth suddenly in certain directions toward the objects attracting them. Under great emotional excitement the auric flames move around in swift circling whirlpools, or else swirl away from a centre. Again, it seems