As I write, a friend lends me a fifteen-dollar volume, a translation just published of an elaborate work by Baron von Schrenck-Notzing, a physician of Munich, giving minute details of four years' experiments in this field. So rigid was this investigator in his efforts to exclude fraud, that not merely was the medium stripped and sewed up in black tights, but the "cabinet" in which she sat was a big sack of black cloth, everywhere sewed tight by machine. Every crevice of the medium's body was searched before and after the tests, and every inch of the "cabinet" gone over. The investigators sat within a couple of feet of the medium, and would draw back the curtains, and while holding her hands and her feet, would watch great masses of filmy gray and white stuff exude from the medium's mouth, from her armpits and breasts and sides. This would happen in red light of a hundred candle power, by which print could be easily read; and the medium would herself illuminate the phenomena with a red electric torch. The investigators would be privileged to examine these "phantom" forms, to touch them gently, and be touched by them--soft and slimy, like the tongue of an animal; but sometimes the things would misbehave, and strike them in the eye, hurting them. The medium, a young French girl living in the home of the wife of a well-known French playwright, had begun with spiritualist ideas, but came to take a matter-of-fact attitude to what happened, and in her trances would labor to mold these emanations into hands or faces, as requested by those present. She finally succeeded in allowing them to separate the soft mucous stuff from her body, and keep it for chemical and bacteriological examination. All this time she would be surrounded by a battery of cameras, nine at once, some of them inside the cabinet; and when the desired emanation was in sight, all these cameras would be set off by flashlight, and in the book you have over two hundred such photographs, showing faces and hands from every point of view. There are even moving-pictures, showing the material coming out of her mouth and going back!