In September, 1857, a peasant woman of Seine-et-Marne, who was minding a cow, was struck by lightning under a tree. The cow was killed, and the woman was thrown on the ground insensible. She was, however, soon revived. In loosening her clothes to attend to her, the people who came to her assistance found perfectly reproduced on her breast _a picture of the cow_. On August 16, 1860, a mill at Lappion (Aisne), belonging to M. Carlier, was struck by lightning. On the back of a woman of forty-four, who was also struck, the lightning left a reproduction (of a reddish hue) of a tree--_trunk_, _branches_, _foliage_, _and all_. Her clothes bore no trace of the passage of the lightning. Unless we are to suppose that all these have been inaccurately observed, it seems to me that we must admit that there is something else besides ecchymoses, something else besides the workings of veins and arteries in these pictures wrought by lightning. Certain of these tree-like pictures resemble the patterns we get in photographing electrical discharges upon sensitized plates. Might they not be produced by this discharge upon the surface of the body--or by the emission of electricity from the body struck? The pictures we shall now hear of, to be distinguished from those already dealt with, are easier to explain, and about their genuineness there can be no doubt. In the summer of 1865, a doctor from the neighbourhood of Vienna, Dr. Derendinger, was returning home by train. On getting out at the station he found that he had not got his purse on him--some one probably had stolen it. This purse was made of tortoise-shell, and had on one side of it a steel plate marked with the doctor's monogram--two D's intermingled. Some time after, the doctor was called to attend to a stranger who had been found lying insensible under a tree, having been struck by lightning. The first thing that he noticed on examining the man's body was that on his thigh there was a reproduction, as though by photography, of his own monogram. His astonishment may be imagined. He succeeded in reviving the stranger, who was taken to a hospital. The doctor remarked that in his clothes his lost tortoise-shell purse would probably be found. So it proved. The individual struck by lightning was the thief. The electric fluid had been attracted by the steel plate, and had imprinted the monogram upon the man's body.