With the discovery of the radio-active principle there came the suggestion that possibly the main virtue of mineral waters at the spring was due to radio-activity. This would not be present in artificial water and would disappear from the natural water during shipment. This new idea was alluring, and it captured many. Radium seemed to be the new panacea. But we are discovering its limitations. It is of little avail in surgery; it is probably of less avail in medicine. As yet, however, we cannot say absolutely and must wait until results are determined. In the mean time many zealous advocates of the marvelous power of radio-activity to cure are exploiting it, apparently getting results and certainly making money. In the case of the mineral waters, also, the most important therapeutic element is probably the mental influence, which is strongest at the spring itself, where the suggestion of efficiency is repeated many times a day, and where the very atmosphere breathes confidence in the results to be obtained. SUGGESTION AND PSEUDO-SCIENCE These applications of science, or rather of supposed science, illustrate the influence of suggestion. The succession of events in each case is about as follows: The definite attitude of mental expectancy is created in the popular mind. As a consequence, with the application of the new scientific principle, patients cease inhibiting the recovery that would have come spontaneously before, only that they were self-centered and had their nervous energies short-circuited. Some are benefited by the habits of life that are established as a consequence of the belief that they are about to be cured, while before this they had been largely confining themselves to their houses, and had been refusing to take recreation or get diversion because of the conviction that they were ill. Finally, many of them had no real physical ills, but were suffering from mental ailments brought on by dreads and by a concentration {46} of attention on certain portions of the body which interfered with the normal physiologic action of those parts. Whenever strong mental impressions are produced, from any cause, results will surely follow, some of them marvelous. The supposed causes of these results will seem quite absurd to those who study them afterwards, but they were living realities to the sufferers. Nothing is more calculated to produce a strong mental impression than a newly discovered scientific fact with some supposedly wonderful application to humanity. The subsequent history of the application of scientific discoveries to medicine has been as invariably the same as the primary enthusiasm over each new therapeutic agent. After a time some people were not benefited. Physicians lost confidence in the power of the new remedial measure, whatever it might be. Patients were no longer impressed by the assurance that they would be benefited, and then the new application has either completely disappeared from our list of remedies, or has