Summing up the foregoing, then, there are two extreme terms of comparison, the very large and the very small, the best and the worst, between which transposition may be effected in one direction or the other. Now, if the interval be gradually narrowed, the contrast between the terms obtained will be less and less violent, and the varieties of comic transposition more and more subtle. The most common of these contrasts is perhaps that between the real and the ideal, between what is and what ought to be. Here again transposition may take place in either direction. Sometimes we state what ought to be done, and pretend to believe that this is just what is actually being done; then we have IRONY. Sometimes, on the contrary, we describe with scrupulous minuteness what is being done, and pretend to believe that this is just what ought to be done; such is often the method of HUMOUR. Humour, thus denned, is the counterpart of irony. Both are forms of satire, but irony is oratorical in its nature, whilst humour partakes of the scientific. Irony is emphasised the higher we allow ourselves to be uplifted by the idea of the good that ought to be: thus irony may grow so hot within us that it becomes a kind of high-pressure eloquence. On the other hand, humour is the more emphasised the deeper we go down into an evil that actually is, in order t o set down its details in the most cold-blooded indifference. Several authors, Jean Paul amongst them, have noticed that humour delights in concrete terms, technical details, definite facts. If our analysis is correct, this is not an accidental trait of humour, it is its very essence. A humorist is a moralist disguised as a scientist, something like an anatomist who practises dissection with the sole object of filling us with disgust; so that humour, in the restricted sense in which we are here regarding the word, is really a transposition from the moral to the scientific. By still further curtailing the interval between the terms transposed, we may now obtain more and more specialised types of comic transpositions. Thus, certain professions have a technical vocabulary: what a wealth of laughable results have been obtained by transposing the ideas of everyday life into this professional jargon! Equally comic is the extension of business phraseology to the social relations of life,--for instance, the phrase of one of Labiche's characters in allusion to an invitation he has received, "Your kindness of the third ult.," thus transposing the commercial formula, "Your favour of the third instant." This class of the comic, moreover, may attain a special profundity of its own when it discloses not merely a professional practice, but a fault in character. Recall to mind the scenes in the Faux Bonshommes and the Famille Benoiton, where marriage is dealt with as a business affair, and matters of sentiment are set down in strictly commercial language.