The physician called on the blacksmith, and taking him by surprise, gazing sternly into his eyes and asked him: "What do you do every night between ten and twelve o'clock?" The blacksmith, frightened and disturbed, stammered out: "I hammer a bar of iron every night at that time, and all the while I think intently of a bad neighbor of mine who once cheated me out of some money; and I 'will' at the same time that the noise will disturb his rest, until he will pay me back my money to get peace and quiet." The physician bade him to desist from his evil practices, under threats of dire punishment; and then went to the farmer and made him straighten out the financial dispute between the two. Thereafter, there was no more trouble. So you see in this case all the necessary elements were present. First there was the belief of the blacksmith in his own powers--this gave him self-confidence and psychic power. Then there was the belief and fear on the part of the farmer--this made him an easy subject, and very susceptible to psychic induction, etc. Then there was the action of the blacksmith beating the iron--this gave force and clearness to his visualization of the idea he wished to induce in the mind of the other. And, finally, there was his will employed in every stroke, going out in the direction of the concentrated wish and purpose of influencing the farmer. You see, then, that every psychic element was present. It was no wonder that the old farmer was disturbed. Among the negroes of the South, in America; and among the Hawaiians; we find marked instances of this kind. The negro Voodoo men and women work black magic on those of their race who are superstitious and credulous, and who have a mortal fear of the Voodoo. You see the conditions obtained are much the same as in the case of the German case just cited. Travellers who have visited the countries in which there is a large negro population, have many interesting tales to recite of the terrible workings of these Voodoo black magicians. In some cases, sickness and even death is the result. But, mark you this! it is only those who believe in, and fear, the power of the Voodoos that are affected. In Hawaii, the Kahunas or native magicians are renowned for their power to cause sickness and death to those who have offended them; or to those who have offended some client of the Kahuna, and who have hired the latter to "pray" the enemy to sickness or death. The poor ignorant Hawaiians, believing implicitly in the power of the Kahunas, and being in deadly fear of them, are very susceptible to their psychic influence, and naturally fall easy victims, unless they buy of the Kahuna, or make peace with his client. White persons living in Hawaii are not affected by the Kahunas, for they do not believe in them, neither do they fear them. Unconsciously, but still strongly, they deny the power, and are immune. So, you see, the principle working out here, also.