"People cannot be too cautious how they receive the doings of those who profess to be in connection with spirits of the other spheres; and to those who wish to inquire into the matter, we would say, Go and hear, but try to keep your wits about you, and not swallow bodily either the preachers or their strange affirmations."--_Horace Greely._ "Under an impression that whatever is communicated by a spirit must, of course, be true, many persons are receiving these communications as the truth of God--as a new revelation from the spirit world. But if these communications are from spirits, we have no proof that they are good spirits. The presumption is, that they are bad spirits--lying spirits. At my house they often accused each other of lying--contradicted at one time what they affirmed at another; inflicted injury upon property in the most wanton manner; and have given conclusive evidence throughout that the discipline of hell, which they profess to have experienced for several years, has not been wholly effectual in improving their characters, and qualifying them for the 'higher spheres' for which many suppose that the discipline after death is a preparation."--_Dr. Phelps._ "Many of the doings of the rapping spirits are too nonsensical and absurd to be believed. They spoil all our notions of the dignity, the _spirituality_, of the spiritual world. That a messenger should come from the spirit land to tell an old woman that her black cat did eat another old woman's white rabbit, is not in accordance with the ideas most people have of the doings and missions of beings in the enjoyment of an immortal state."--_Puritan Recorder._ PERSONS TRAINED BY A LECTURER. We have been informed, by a certain mesmerizer, that a distinguished lecturer upon magnetism frequently trains persons to enact certain parts in his public exhibitions. He first puts them under mesmeric influence, and while in that state they are instructed to say certain things, or to perform certain acts, which he wishes to exhibit at some subsequent lecture. To this they severally agree, and thus a regular programme, or series of performances, is made out. They are then brought out of the mesmeric state, having been previously willed by the operator to forget all that has passed while in that state. At the next meeting appointed, these persons are present, and are again put into the same state as before, when they immediately perceive, and are ready to perform, the several parts assigned to them. In fact, they are so completely under the will and control of the lecturer, that they _must_ do or say _what he wills them to do or say_, and they cannot help it, neither can they have the least recollection of what has transpired, after being restored to the normal state. SCENE AT EAST BOSTON.