"Mr. Taylor then gives a history of the earlier manifestations of spirit photography, and goes on to explain how striking phenomena in photographing what is invisible to the eye may be produced by the agency of florescence. He quotes the demonstration of Dr. Gladstone, F.R.S., at the Bradford meeting of the British Association in 1873, showing that invisible drawings on white cards have produced bold and clear photographs when no eye could see the drawings themselves. Hence, as Mr. Taylor says: 'The photographing of an invisible image is not scientifically impossible.' "Mr. Taylor then proceeds to describe some personal experiments. He says: 'For several years I have experienced a strong desire to ascertain by personal investigation the amount of truth in the ever-recurring allegation that figures, other than those visually present in the room, appeared on the sensitive plate.... Mr. D., of Glasgow, in whose presence psychic photographs have long been alleged to be obtained, was lately in London on a visit, and a mutual friend got him to consent to extend his stay in order that I might try to get a psychic photograph under test conditions. To this he willingly agreed. My conditions were exceedingly simple, were courteously expressed to the host, and entirely acquiesced in. They were that I, for the nonce, would assume them all to be tricksters, and, to guard against fraud, should use my own camera and unopened packages of dry plates purchased from dealers of repute, and that I should be excused from allowing a plate to go out of my own hand till after development, unless I felt otherwise disposed; but that as I was to treat them as under suspicion, so must they treat me, and that every act I performed must be in the presence of two witnesses; nay, that I would set a watch upon my own camera in the guise of a duplicate one of the same focus--in other words, I would use a binocular stereoscopic camera and dictate all the conditions of operation.... "'Dr. G. was the first sitter, and, for a reason known to myself, I used a monocular camera. I myself took the plate out of a packet just previously ripped up, under the surveillance of my two detectives. I placed the slide in my pocket and exposed it by magnesium ribbon which I held in my own hand, keeping one eye, as it were, on the sitter, and the other on the camera. There was no background. I myself took the plate from the dark slide, and, under the eyes of the two detectives, placed it in the developing dish. Between the camera and the sitter a female figure was developed, rather in a more pronounced form than that of the sitter.... I submit this picture.... I do not recognize her, or any of the other figures I obtained, as like any one I know....