My Library

The habitues of seances will no doubt have noticed that materializations are of three kinds:—Fir.^f, those which are tangible but not visible ; second, those which are visible but not tangible ; and third, thdse which are both visible and tangible. To the first kind, which is mhch the most common, belong the invisible spirit hands which ;jo frequently strike the faces of the sitters or carry small obj'ects about the room, and the vocal organs from which the "direct voice” proceeds. In this case, an order of matter is being used which can neither reflect nor obstruct light, but which is capable under certain conditions of. setting up vibrations in the atmosphere which affect us as sound.
A variation of this class is that kind of partial photographs materialization which, though incapable of reflecting any light that we can see, is yet able to affect some of the ultra-violet rays, and ban therefore make a more or lessdefinite impression upon thccamera,and so provide us with what are known as"spirit photographs.”
When there is not sufficient power available to produce a perfect materialization we sometimes getthevaporous-looking form which constitutes our second class, and'iii such a case the" spirits ” usually warn their sitters that the forms which