EXPLANATION.--It is inexpedient for us to give a full and minute description of the several points and peculiarities of the mechanism of this apparatus; but we may so far explain as to say that a horizontal lever inside of the boiler, being mounted on a pivot near its centre, and connected to a buoy or float at one end, as represented in the engraving, (a part of the surface of the boiler being omitted for that purpose, and not, as some might infer, to represent the apparatus attached to a boiler already burst by an explosion.) One of these floats is placed within a small enclosed box within the boiler, that it may be secure from the effect of foam which sometimes pervades the surface of the water in a steam boiler.--This lever, near its bearing, is connected to a short valve-rod, which governs the valves in a small valve-chamber, whereby the steam is occasionally admitted to operate a small steam engine, placed directly over the boiler; and this engine puts in motion a pump, by which the water in the boiler is replenished. This engine, it will be understood, is never put in operation except when the water in the boiler becomes too low: and when the water rises, the elevation of the encased float closes the valve and stops the engine. The ball on the end of the lever acts as a counterpoise to the float, (which is of stone) that it may be freely influenced by the rising or falling of the surface of the water. The small engine constructed by Mr. Barnum for this purpose, is well adapted to its place, and has several peculiarities whereby the valves, and consequent reciprocal motion of the engine are regulated without the use of a crank or fly-wheel: but of these we cannot at present give a minute description. The whole of this apparatus evinces much scientific ability of the inventor, Daniel Barnum, Esq., resident at present in this city, and who has received many certificates from the first scientific men in the Union, in commendation of his invention. =A Piggish Parvenue.= A proud porker, fancying that it was degrading to his dignity to root in the gutter, came upon the sidewalk, and full of his consequence, promenaded from morning till night, leaving his humbler companions to munch corn, husks and potatoe parings. He fared as people usually do, who from vanity assume a station they are not qualified to fill. In the gutter he would have lived in unnoticed enjoyment. On the walk he got kicked by every passenger and bitten by every cur, till hungry and bruised he was glad to return to his proper station.--[Ex, paper. =Wanting Workmen back Again.= The proprietors of the cotton mill in Schuylerville, N. Y., who reduced the wages of their hands, a week or two since, says the Schuylerville Herald, twenty-five per cent., are now, and have been for several days, endeavoring to induce them to return to their work, at the old wages; but they are too late, as most of them are engaged to work in other mills. =Hard Climbing.=