Can See the Human Heart

Nikola Tesla Evolves More Marvels by Means of the X Ray.

New York, April 22. — Nikola Tesla is still devoting a great deal of time to the scientific investigation of the Roentgen ray effects. In a long communication to the Electrical Review, he announced among others, two interesting results he has achieved. One of these is that if a sensitive film be placed between two plates, say of magnesium and copper, a true Roentgen radiograph would be obtained after a very long exposure in the dark. Another wonderful result Tesla has obtained is that by the use of a new type of fluorescent screen devised in his laboratory he has been able to greatly increase the sharpness of the outlines in a shadow on the screen, and to actually see the human heart. Regarding this Tesla says:

"By the use of the above apparatus I have been enabled to examine much better than before the body by means of the fluorescent screen. Presently the vertebral column can be seen quite clearly, even in the lower part of the body. I have also clearly noted the outlines of the hip bones. Looking in the region of the heart I have been able to locate it unmistakably. The background appeared much brighter, and this difference in the intensity of the shadow and surrounding has surprised me. The ribs I could now see on a number of occasions quite distinctly as well as the shoulder bones. Of course, there is no difficulty whatever in observing the bones of all the limbs."

This latter discovery, he thinks, is capable of extensive practical application.