It is because Robert-Houdin was seemingly the first conjurer to adopt these principles as his irrefragable code of procedure that he is to be accepted as the father of modern magic. He never allowed himself to parade his skill in manipulating coins and cards at the risk of distracting the attention of the spectators from the central and culminating effect around which he had constructed his plot. No doubt, he possessed dexterity in abundance, but it was subordinate to his dramatic intent. No doubt, again, some of the devices he used had sometimes been employed by a long succession of his predecessors in conjuring. As a matter of course he availed himself of all sorts of mere tricks, of ingenious sleights, and of artful apparatus that the conjurers who went before him had devised for their own use long before he was born. An experiment in magic--to use the term that Mr. Maskelyne prefers, is not a mere trick--or at least it ought not to be. It is not the exhibition of a device or of a sleight or of an adroit mechanical apparatus. Rather is it a coherent whole, direct in its development, no matter how many subtleties of concealment and deception it may employ in the course of its accomplishment. Most amateurs in the art of magic, and also only too many professional performers, place their reliance mainly upon the trick itself--the deceptive manipulation or the novel apparatus--and are satisfied to get out of it what they can. They invent new methods of changing a card or of making coins pass into a box, overlooking the fact that these inventions are valueless except as they may be utilized to facilitate the execution of one of those larger feats which only are fairly to be entitled experiments in magic, and which are distinguished always by the direct simplicity and the straightforward unity of their plots. In fact, an experiment in magic must aim at that totality of effect, that perfect subordination of the minor means to the major end, which Poe insisted upon as the dominant characteristic of the true short-story. And this totality of effect can be achieved only by the rigorous exclusion of everything which in any way contradicts that central idea out of which the true short-story must always be developed. Unity and totality, and a rigorous obedience to what Herbert Spencer called the Principle of Economy of Attention--these are the essential elements in the presentation of a worthy experiment in magic.