_Second_ is the contact process by which a small negative of the “spirit” face is mounted on a background of card prepared with radioactive salt solution. Many of these salts are rich in infra-red rays which will project an image through a metal dark slide. The “medium” has only to handle the dark slide during the sitting or the plate in the dark room previous to development, in order to make a contact image. A cruder variation of this, the electric pencil flashlight with a rubber cup over the end containing the “spirit face” negative contact with the exposed plate, is achieved in the dark room. The instrument lies hidden in the medium’s sleeves. _The third method_ is that most commonly used. The “spirit image” is projected through a minute lens in a hole in the wall of the studio. The beam of light is sometimes passed through a prism series in order to allow a room parallel to the studio to be used for the purpose of projecting, and it is possible for the apparatus to be arranged inside a piece of furniture in the studio. The sitter usually has his back to the source of the projection and the “medium” takes the photograph and makes the exposure, so the fraud is childishly easy. Even expert photographers are fooled by this trick, as they are satisfied that if plates, slide, and camera are not tampered with, fraud is impossible. When stereoscopic cameras with twin lenses are used the fraud is manifest. Sometimes the fakers try hard to get an image into each half of the plate, but never are the “spirit images” in the same relative position or plane. If the sitters are well-known it is not difficult for photographs of deceased relatives to be obtained and the spirit negative made from the photograph. In many cases reproduction of newspaper halftone blocks have been found on so-called spirit pictures. These show the diamond patterns of the screen and are obvious fakes, but are accepted by many uncritical believers. In the case of an unknown sitter, strange blurred faces or perfect strangers are thrown on to the plate and excused as “guardian angels.” When the medium’s own apparatus or dark room is used there are endless ways of faking, but it is these methods of faking an image without raising the ordinary photographer’s suspicions that are interesting. The whole business is a cruel and heartless fraud, but the dupes are not really deserving of pity. If there was a word of truth in the claim of “spirit photographers” the testimony of an official test by a reputable committee of the Royal Photographic Society would settle the question once and for all.