This shows how necessary it is that the physician and surgeon should be capable of diagnosing and treating disease in all parts of the body, especially if his practice be limited to the country, where he may be unable to consult with specialists. If the pathological condition he has treated does not “clear up,” the case should be referred to the specialist or dentists, for, to secure results, all parts of the zones or group of zones must be free from obstruction and irritation. Zone therapy demonstrates the co-relation of all parts of the body, also the manner in which pressure or contact upon certain zones is effective in the relief of pain or disease. Diagnosis of the cause of pain may be worked out quite perfectly over or through any zone or part of zone. If a patient complains of pain, and indicates that the right eye is involved, and you overcome the pain by pressure on the front of the right index finger, it is absolutely certain that his disturbance is excited by congestion or irritation in the anterior section of the zone; but if it be necessary to look to the palmar surface of the index finger for relief the cause is certain to exist in the posterior section of the zone or zones. We have never suggested this work as a panacea, but finding it helpful in the treatment of human ills, we consider it an asset to our knowledge of medicine and surgery, and have been glad to offer it gratuitously to physicians, surgeons, and dentists, and to all who can make use of it in the relief of afflicted humanity. [Illustration: Valens Metronomic Interrupter (Style D) (For Producing Dr. White’s Pulsoidal Current) FIG. 33.] CHAPTER 18. FOOD FOR THOUGHT. When “Professor” Robert Fitzsimmons delivered the famous punch in the solar plexus that laid the mighty James Corbett upon whatever it is they cover a boxing ring with, he demonstrated to everybody’s satisfaction--except perhaps Mr. Corbett’s--that there is a group of nerves in the “pit of the stomach” which has an intimate and most distressful connection with the brain. And now every doctor knows the functions and connections of the pneumogastric nerve. Gunmen, pugilists, and “bouncers” also know that if the temple, or the angle of the jaw, be even lightly “tapped,” the tappee is usually placed hors de combat for an appreciable period of time. General knowledge of this weighty academic subject is comparatively recent--as time is reckoned. And the Japs, in their uncanny knowledge of nerve anatomy, exemplified in their proficiency in jui jitsu, have shown that, by pressure upon certain nerve terminals, or upon plexuses of nerve groups they are able to do almost everything except murder a victim. Perhaps they could do this, also, if they were sufficiently industrious and persevering.