This variety causes confusion. It might vex us because we have devoted so much time to the consideration of the technical means of wit, and the stress laid on the forms might possibly arouse our suspicions that we are overvaluing their importance so far as the knowledge of the nature of wit is concerned. But this conjecture is met by the one irrefutable fact: namely, that each time the wit disappears as soon as we remove the effect that was brought to expression by these techniques. We are thus directed to search for the unity in this variety. It must be possible to bring all these techniques under one head. As we have remarked before, it is not difficult to unite the second and third groups, for the double meaning, the play on words, is nothing but the ideal case of utilizing the same material. The latter is here apparently the more comprehensive conception. The examples of dividing, changing the order of the same material, manifold application with slight modifications (c, d, e)—all these could, without difficulty, be subordinated under the conception of double meaning. But what community exists between the technique of the first group—condensation with substitutive formation—and the two other groups—manifold application of the same material? _The Tendency to Economy_ It seems to me that this agreement is very simple and clear. The application of the same material is only a special case of condensation and the play on words is nothing but a condensation without substitutive formation. Condensation thus remains as the chief category. A compressing or—to be more exact—an economic tendency controls all these techniques. As Prince Hamlet says: “Thrift, Horatio, thrift.” It seems to be all a matter of economy. Let us examine this economy in individual cases. “_C’est le premier vol de l’aigle._” That is, the first flight of the eagle. Certainly, but it is a depredatious flight. Luckily for the gist of this joke “vol” signifies flight as well as depredation. Has nothing been condensed and economized by this? Certainly, the entire second thought, and it was dropped without any substitution. The double sense of the word “vol” makes such substitution superfluous, or what is just as correct: The word “vol” contains the substitution for the repressed thought without the necessity of supplementing or varying the first sentence. Therein consists the benefit of the double meaning. Another example: _Gold mine_,—_gold spoon_, the enormous economy of expression the single word “gold” produces. It really tells the history of two generations in the life of some American families. The father made his fortune through hard toiling in the gold fields during the early pioneer days. The son was born with a golden spoon in his mouth; having been brought up as the son of a wealthy man, he becomes a chronic alcoholic and has to take the gold cure.