This article from the Newspaper Archives is about the experiments Nikola Tesla began to do with X-rays during 1896.
The Constitution, Atlanta, Georgia, page 9. Friday, March 13, 1896.
EXPERIMENTS MADE BY NIKOLA
Shoulder of a Man Taken Through His
Clothing--Chalky Deposits Infal-
Mr. Tesla also states that the refraction of the Crooke's tubes used in these experiments may be increased by electrical means to any degree desirable far beyond that obtainable by mechanical appliances. This method he describes. In regard to the nature of the X rays, he says:
"It is now demonstrated beyond any doubt that small metallic objects, or bony or chalky deposits can be infallibly detected in any part of the body."
Tesla has also secured radiographs showing the bony structure of birds and rabbits, even to the hollow bones. He has secured a radiograph of a rabbit after an hour's exposure, in which not only details of the skeleton are visible; but also a clear outline of the abdominal cavity, location of lungs and the fur are shown. Radiographs of large birds show the feathers distinctly; in another instance an exposure of forty minutes gave a radiograph of the human skull, showing clearly not only the outline, but the cavity of the eye, chin, cheek, nasal bones, the lower jaw and connection to the upper one, the vertebral column and connections to the skull, the flesh and even the hair.
"By exposing the head to a powerful radiation, strange effects have been noted. For instance, I find that there is a tendency to sleep, and the time seems to pass away quickly. There is a general soothing effect, and I have felt a sensation of warmth in the upper part of the head. An assistant independently confirmed the tendency to sleep and a quick lapse of time. Should these remarkable effects be verified by men with keener sense of observation, I shall still more firmly believe in the existence of material streams penetrating the skull. Thus it may be possible by these strange appliances to project a suitable chemical into any part of the body."