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Show the human eve, to produce a picture ou a plate prop-eryl prop-eryl sensitized and in a .room pitch' dark, .The discovery dis-covery was made while X-ray photographs were being be-ing taken. While an iron tripod stand, with a ring-shaped ring-shaped top as a( support for a photographic plate, was being used, it was' observed that the plate, when exposed to the rays, was affected by the iron ring below. Puzzled at this 6eeming departure from the rules, the operator attempted to discover the cause. In so doing one of his assistants placed his hand below the plate.v The result was an imperfect im-perfect radiogram of the bones of the human hand, like those obtained from the Roentgen rays when experimentation in that line was in its first stages. It was so entirely new that Prof. Ooodspeed was perplexed. He tried again and again. Every time a human hand was placed within the proper focus the same .amazing phenomena followed. The experiments exper-iments were continued for three months, and the conclusion of Frof. Goodspeed was cot. announced until he had satisfied himself beyond all question of the correctness of his results. Prof. Goodspeed is one of the big men of Pennsylvania university. He is conservative but persistent, and his present discovery dis-covery is probably the first of a series of announcements announce-ments of more than ordinary interest in the scientific scien-tific world which he is preparing to make. Prof. Goodspeed's Latest Discovery. The discovery made by Prof. A. W. Goodspeed of the Randall Morgan Laboratory of Physics of the University of Pennsylvania, that rays of light emanate em-anate from the human body and are visible to the eyes of . some of the lower animals, forms a most interesting in-teresting scientific study. The discovery, as is almost invariably the rule, was made by accident ac-cident y It opens a new and probably fallow field for scientific research. Divested of its technical terms, the discovery of Prof, Goodspeed means that the rays of light shed from a living human body may have sufficient intensity, although invisible to |