Master Jim Curtis is one of those youths whose office it is to supply the tea-tables of the higher classes with muffins and crumpets, nominally all hot, but really, owing to the colloquial propensities of the bearers, in general not at all hot. Among his compeers he is considered a peculiarly accomplished lad. He is always sure to be acquainted with the last new song, for shocking as the idea appears, there are "last new songs," in streets as well as in drawing-rooms--we are informed that the present popular favourite is "Happy Land;" it having succeeded "Sitch a gittin' up stairs;" previously to which the alleys were taught by our young Mobility to echo the atrocious "Jim Crow." These various airs Master Jim Curtis is also in the habit of whistling as he runs along; his execution being characterised by great power, particularly in the higher notes; though his compass, perhaps, is not very extended. He is likewise a first-rate performer on that classical instrument the Jews'-harp. In all those various games of skill which consist in tossing coins and buttons about in gutters, his attainments are unrivalled; and he is equally expert at the pastime called "leap-frog," and similar gymnastic exercises. Genius, it is said, is shown in striking out new paths; and Master Curtis, in the language of his acquaintance, is an "out-and-outer" (a low term for a person of talent) at striking out a slide. In a general way, so remarkable is his intellectual acumen, that he is said by all who know him to be perpetually--we cannot avoid the phrase--wide awake. In disposition he has somewhat of a satirical turn, and his caustic powers are not only evinced in "chaffing" his equals, but also, whenever an opportunity occurs, at the expense of his superiors. Master Mike Waters is connected with the press, in the capacity of an acting distributor of diurnal literature. He is a cultivator, to a certain extent, of those elegant pursuits in which Master Curtis has made such striking progress. His natural endowments, indeed, are not of so brilliant a class as those of the latter; as a vocalist, for instance, he does not rise much above mediocrity, his notion of a tune being generally not quite perfect, and his memory seldom serving to retain more than the first line of a song. He appears, however, to be very diligent in his musical studies, and what he does know, is almost continually in his mouth. There is, too, one particular science for which he certainly has a decided taste; namely, Natural Philosophy, and he may frequently be seen on a day fit for the purpose, that is, on a wet one, performing pneumatic experiments on loose stones and cellar plates. Of the nature of these experiments it may be necessary that we should give a brief description. Their object is to elevate the paving stones or plates from the situation which they occupy, and is thus effected: