The scene is a laboratory, with rows of raised seats at one side for the physicians who attend the clinic. There is a table, with the instruments of measurement, and Dr. Abrams sits beside it, and before him stands a young man stripped to the waist. The doctor is tapping upon the abdomen of this man, and listening to the sounds. You will find this the weirdest part of the whole procedure, for you will naturally assume that this young man is being examined, and will be dazed when some one explains that the patient is in Toronto or Boston or New Orleans, and that this young man's body is the instrument which the doctor uses in the determining of the vibration rates of the patient's blood. Dr. Abrams tried numerous instruments, but has been able to find nothing so sensitive to electronic activity as a human body. He explains to his classes that the spinal cord is composed of millions of nerve fibres of different vibration rates; hence a certain rate communicated to the body, is automatically sorted out, and appears on a certain precise spot of the body in the form of increased activity, increased blood pressure in the cells, and hence what all physicians know as a "dull area," which can be discovered by what is known as "percussion," a tapping with a finger. To map out these areas is merely a matter of long and patient experiment; and Abrams has been studying this subject for some twenty years--he is author of a text-book on what is known as the "reactions of Abrams." So now he provides the world with a series of maps of the human body; and he sits in front of his "subject," and his assistant places a specimen of blood in a little electrically connected box, and sets the rheostat at some vibration number--say fifty--and Dr. Abrams taps on a certain square inch of the abdomen of his "subject," and announces the dread word "cancer." Then he places the electrode on another part of the "subject's" body, and taps some more, and announces that it is cancer of the small intestine, left side; some more tapping, and he announces that its intensity is twelve ohms, which is severe; and pretty soon there is speeding a telegram to the physician who has sent this blood specimen, telling him these facts, and prescribing a certain vibration rate upon the "oscilloclast," the instrument of radio-activity which Dr. Abrams has devised.