These classes have a slang of their own too; and some of it gets established in the language. Broadly speaking, all foreign words which are adopted from affectation, and not from the growing necessities of science and thought, may be ranked as slang. That they should occasionally effect a lodgment it is not at all indispensable that they should impart a new idea. Very often they merely elbow out an old member of the vernacular conveying precisely the same meaning. It would be easy to cite such cases, and to point to naturalized foreigners, now unnoticed in every-day intercourse, but at their first appearance conspicuous enough in fashionable slang. Scores of them have been introduced to us by the milliner and the tailor. Vouched for by such august authority, they are of course elegant. But they are nothing more. More solid merit than theirs, in the eyes of the student of language, belongs to the humbler products of the popular fancy--words more pointed, more pithy and more graphic, but more fleeting. ANOTHER DEFUNCT MONOPOLY. The patent on sewing-machines has passed into limbo with the patent on the revolver and the steam-engine and the patent on gunpowder, if Friar Bacon ever entered his caveat, paid his fee, fought the pirates through the courts and took one out--a point on which history, which chronicles the minutest military or judicial homicide and the most contemptible court-intrigue of his day, forgets to inform us. His last possible renewal, however, would have in any case died out long ago, and left his valuable contribution to human happiness as common property as the contrivance of the blind, bedevilled, rich and unhappy originator of the sewing-machine.