Dudley F. Sicher, in the "Popular Science Monthly," September, 1905, comments on the enormous development of quackery, which has been more than commensurate with the growth of medical science and the advance of western civilization, in recent years. According to this authority, the number of resident quacks in Berlin, Germany, has increased sixteen-fold since 1874. And in New York City, there are approximately twenty thousand, against six thousand regular practitioners. "Given on the one hand the limitations of scientific medicine, the dread of disease, and the power of auto-suggestion, and on the other hand, depraved humanity, hard-driven in the struggle for existence, and you have the essential parts, which, with a few minor pieces, make up the quackery machine. . . . Psycho-therapeutics and knowledge of human nature make up the quack's entire outfit." The popular distrust of legitimate Medicine facilitates a recourse to the alleged marvellous specifics and panaceas, so extensively advertised; lineal descendants of the magical remedies of old. Then, too, the secrecy and mystery associated with the remedies of quacks, appeal strongly to the popular fancy. Charles Dickens wrote in "Barnaby Rudge" that it was only necessary to invest anything, however absurd, with an air of mystery, in order to give it a secret charm and power of attraction, which people are unable to resist. False prophets, he said, false priests, false doctors, false prodigies of whatever kind, veiling their proceedings in mystery, have always addressed themselves at an immense advantage, to the popular credulity, and have been, perhaps, more indebted to that resource in gaining and keeping for a time the upper hand of Truth and Common Sense, than to any half-dozen items in the whole catalogue of imposture. To awaken curiosity and to gratify it by slow degrees, yet leaving something always in suspense, is to establish the surest hold that can be had, in wrong, on the unthinking portion of mankind. Unscrupulous charlatans have shrewdness enough to make free use of the power of suggestion in their nefarious practice, though oftentimes doubtless wholly ignorant of its mode of action. The great majority of them, while probably unaware of the existence of subconscious mental life, have always had a vivid realization of the positive fact of the gullibility of human nature, a fact which affords them the keenest pleasure and enduring satisfaction. One can well imagine that the winning smile which often illumines the features of a sleek and crafty pretender, is supplanted by audible chuckling when he retires from company. Having long since gotten rid of his conscience, he can afford to be merry at the expense of his fellow creatures.