In the year 1804, an invisible lady and acoustic temple were exhibited in Boston, as an "Extraordinary Aerial Phenomenon." Its body was made of glass It gave answers to questions asked by visitors. In London, a few years ago, there was shown an apparatus consisting of a four-footed stand, and several trumpet-mouthed tubes, from any one of which spectators received ready answers to questions. The answers were said to come from the "invisible girl;" but the true explanation of the puzzle was, that a secret tube, in the legs of the apparatus, communicated the sounds to a girl in a neighboring apartment. Probably something similar was arranged in the glass body exhibited in Boston; and if we mistake not, during the sojourn of Joice Heth, of more recent notoriety, at the Albany Museum, a shrewd Albanian, after a minute and diligent examination, made the wonderful discovery that the old lady, or nurse of Washington, was composed of India rubber, and was made to breathe, speak, cry, sing, &c., by the aid of ventriloquism!

In a case of spirit rappings, Professor Grimes discovered that the party had contrived to have some levers concealed beneath the floor, and by means of certain little pegs coming through where the rappers sat, connecting with the levers, all nicely poised on a balance, they placed their feet upon them, and produced the raps at pleasure. And in the case of the Rochester rappers, when their ankles were firmly held by the committee of investigation, it is said a servant girl rapped with her knuckles under the floor. Mrs. Culver, who had been instructed by the Fox family, and had practised with them a while, afterwards renounced the craft, and exposed this among other deceptions to the world. "The girl," she says, "was instructed to rap whenever she heard their voices calling for spirits."