The late Dr. Leonard Caughey, of Baltimore, Maryland, an intimate friend of the writer, made a specialty of anti-Spiritualistic tricks, and among others performed this cabinet test of Keeler's. He bought the secret from a broken-down medium for a few dollars, and added to it certain effects of his own, that far surpassed any of Keeler's. The writer has seen Dr. Caughey give the tests, and create the utmost astonishment. His improvement on the trick consisted in the use of a spring clasp like those used by gentlemen bicycle riders to keep their trousers in at the ankles. One end terminated in a soft rubber or chamois skin tip, shaped like a thumb, the other end had four representations of fingers. Two wire rings were soldered on the back of the clasp. This apparatus he had concealed under his vest. Before the curtain of the cabinet was drawn, Dr. Caughey grasped the arm of the lady on his right in the following manner: The thumb of his left hand under her wrist, the fingers extended above it; the thumb of his right hand resting on the thumb of the left, the fingers lightly resting on the fingers of the left hand. As soon as the curtain was fastened he extended the fourth and index fingers of the left hand to the fullest extent and pressed hard upon the lady's arm, relaxing at the same time the pressure of his second and third fingers. This movement exactly simulates the grasp of two hands, and enables the medium to take away his right hand altogether. Dr. Caughey then took his spring clasp, opened it by inserting his thumb and first finger in the soldered rings above mentioned, and lightly fastened it on the lady's arm near the wrist, relaxing the pressure of the first and fourth fingers of the left hand at the same moment. "I will slide my right hand along your arm, and grasp you near the elbow. It will relieve the pressure about your wrist; besides be more convincing to you that there is no trickery." So saying, he quickly slid the apparatus along her arm, and left it in the position spoken of. This produces a perfect illusion, the clasp with its trick thumb and fingers working to perfection. This apparatus may also be used in the following manner: Roll up your sleeves and exhibit your hands to the sitter. Tell him you are going to stand behind him and grasp his arms firmly near the shoulders. Take your position immediately under the gas jet. Ask him to please lower the light. Produce the trick clasps, distend them by means of your thumbs and fingers, and after the gas is lowered, grasp the sitter in the manner described. Remove your fingers and thumbs lightly from the clasps and perform various mediumistic evolutions, such as writing a message on a pad or slate placed on the sitter's head; strike him gently on his cheek with a damp glove, etc. When the séance is over, insert your fingers and thumbs in the soldered rings, remove the clasps and conceal them quickly. EUSAPIA PALADINO.