Here is still another test. A person writes a question on the slate and places it, written side down, on the table. All this when the medium is not looking. The medium takes his seat at the table, places one hand on the slate (so does the skeptic, the other hand on the medium’s forehead). With the disengaged hand the medium now proceeds to write on the upper surface of the slate. When he has finished, the communication is read, and it is found to be a correct answer to the question on the opposite side of the slate. To perform this seeming impossibility the medium has to employ a table containing a trap smaller than the frame of the slate. When the slate is placed on the table, the medium shifts it over this trap. The trap is then opened, and by means of mirrors, 3, 4, 5, placed at angles of 45 degrees in the body of the table, the writing is reflected to the very place where the medium is sitting, and the image is reversed to normal by the third mirror, and it is easy then to give an answer to it. (Fig. 18.) [Illustration: Fig. 18.--Reading the Questions by Means of Mirrors.] The following is how writing can be made to appear on a slate on which a person has placed his initials in one corner of it, which is then placed with that side downward on the table, and shortly afterward, on turning it over, it is found completely covered with writing, and the signature of the visitor proves there has been no exchange of the slate. The secret of obtaining this effect is both a unique and quite original method. [Illustration: Fig. 19.--The Interrupted Flap.] The writing is already on the slate and is hidden from view by the false flap, which has a corner missing from it. This missing corner is where the clever idea comes in. After the medium cleans both sides of the slate, he says: “I will just draw a chalk mark down in this corner of the slate wherein the gentleman is to place his signature.” He really draws the chalk mark on the slate proper, but close to the edge of the missing corner of the flap, thus disguising the joint, and after the flap is dropped out of the slate of course this mark and signature still remains. (Fig. 19.) Here is still another. The medium cleans a slate on both sides and hands it to a skeptic to place his mark on it. It is then placed on the table, face downward, and in a short time, on being turned over, it is found with a spirit message on it. This is performed as follows: Let the message be written on the slate and then sponged out with alcohol, and when the slate dries, the writing will be as plain as ever.