differentiated into forms, endowed with more or less consciousness and capacities for feeling, and hours of enjoyment, or pain. But these, never or rarely, entering any more deeply into dense matter than enabled so to do by their aerial invisible bodies, do not appear upon our gross physical plane otherwise than as forces, energies, or influences. Their soul-forms are the intermediate link between matter and spirit, resembling the soul-forms of animals and men, which also form this intermediate link, the difference being that the souls of animals and men have enveloped themselves in a casing of dense matter for the purposes of existence upon the more external planes of life. Consequently, after the death of the external bodies of men and animals, there remain astral remnants which undergo gradual disintegration in the astral atmospheres. These have been termed _elementaries_; _i.e._, "the astral corpses of the dead; the ethereal counterpart of the once living person, which will sooner or later be decomposed into its astral elements, as the physical body is dissolved into the elements to which it belongs. The elementaries of good people have little cohesion and evaporate soon; those of wicked people may exist a long time; those of suicides, etc., have a life and consciousness of their own as long as a division of principles has not taken place. These are the most dangerous." In the introduction to _Isis Unveiled_, we find the following definition of elemental spirits: "The creatures evolved in the four kingdoms of earth, air, fire, and water, and called by the Kabalists gnomes, sylphs, salamanders, and undines. They may be termed the forces of nature, and will either operate effects as the servile agents of general law, or may be employed by the disembodied spirits--whether pure or impure--and by living adepts of magic and sorcery, to produce desired phenomenal results. _Such_ beings never become men." (But there are classes of elemental spirits who do become men, as we shall see further on.) "Under the general designation of fairies and fays, these spirits of the elements appear in the myth, fable, tradition, and poetry of all nations, ancient and modern. Their names are legion--peris, devs, djins, sylvans, satyrs, fawns, elves, dwarfs, trolls, kobolds, brownies, stromkarls, undines, nixies, salamanders, goblins, banshees, kelpies, prixies, moss people, good people, good neighbors, wild women, men of peace, white ladies, and many more. They have been seen, feared, blessed, banned, and invoked in every quarter of the globe and in every age. These elementals are the principal agents of disembodied but never visible spirits at seances, and the producers of all the phenomena except the 'subjective.'"--(Preface xxix, vol. I.)